Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c2a5e25dfaecc6b…

MALICIOUS

PDF

79.7 KB Created: 2021-03-11 21:07:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 649f5e68989474650ef516fd5ce3609c SHA-1: 21adb6c79bb79a08ee5498a2bccfbec620150d74 SHA-256: 0c2a5e25dfaecc6b1e417d58e3aaf83bc1a4b9634dc5d48905ea64e5f784830a
266 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document exhibits multiple indicators of malicious intent, including a high ML classifier score and ClamAV detection as a phishing trojan. It contains a link farm with numerous external URLs, some hosted on disposable domains, suggesting an attempt to distribute further malicious content or redirect users. The document body, though heavily obfuscated, combined with the 'SE_SECRET_RECOVERY_LURE' heuristic, indicates a strong likelihood of a phishing attempt designed to trick users into divulging sensitive recovery secrets or private keys.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://xajibur.ru/wix?keyword=jcp+associate+kiosk PDF link annotation
    • http://freshka.fun/abbyy_transformer_12_fulldhk96.pdfIn PDF document text
    • http://prolac.ru/krishna_bhajan_lyrics_in_englishll6qd.pdfIn PDF document text
    • http://artdebug.site/how_to_critique_jazz_musicxjppm.pdfIn PDF document text
    • http://pl50off.info/61452654586ct29d.pdfIn PDF document text
    • http://policyhelpcenter.com/batitadidaletawibatezogiayg5.pdfIn PDF document text
    • https://mosuvixixe.weebly.com/uploads/1/3/0/9/130969854/98550006.pdfIn PDF document text
    • http://timecodes.net/finding_gradient_worksheet_tesoqife.pdfIn PDF document text
    • http://raisinshub.pro/theseus_and_the_minotaur_storyme59d.pdfIn PDF document text
    • http://meetchat.space/beach_wallpaper_hd_free9xlit.pdfIn PDF document text
    • http://idealica-italiaofficial.site/beery_vmi_assessment_reportmdj05.pdfIn PDF document text
    • http://mazafaka69pussy.online/best_jazz_chord_progressions_guitarktj4w.pdfIn PDF document text
    • https://xufiridib.weebly.com/uploads/1/3/5/3/135346556/f7462575013.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://6f465708-eb37-4ee2-8658-ebeec6cd93ea.filesusr.com/ugd/4bb103_eaf826ca672546ebb6fadc3d4d9e2a26.pdf?index=trueIn PDF document text
    • https://7e6b698e-d56f-4a21-8c48-787e2f6d39f4.filesusr.com/ugd/7836c9_15bad636df484db3bfea80b7834a0836.pdf?index=trueIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_6d86a4bdd56d49be964f482f1520a199.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e2db55b-ee93-4182-a99e-a14252d09b64/viriti.pdfIn PDF document text
    • https://3f46bf15-0a8c-4e80-b3e5-a2e3bf90e008.filesusr.com/ugd/8e6e76_d651d016ff0a4f119488468f9af282f0.pdf?index=trueIn PDF document text
    • https://4868a29a-6d77-448d-a9c5-bc5c6a1713c3.filesusr.com/ugd/060e50_e4701a97f20841db8959396c7159b0fa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5b31cd3-114f-4418-9f80-a6fb4d37657b/40955134417.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aa8e5b0-25d4-4f68-bdb9-1acf9264f180/23552134188.pdfIn PDF document text
    • https://46c0acaa-de7d-4f46-84f0-c2cf1d8ff7d9.filesusr.com/ugd/ac1638_82e7c5678da340a087682a6fc7769e1b.pdf?index=trueIn PDF document text
    • https://3c1efe6f-6e34-41bb-a2c4-2be85dd3cb33.filesusr.com/ugd/41f880_b7e4f6274c0b49b4842d45b0e8103043.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8491cee-ab7f-45ab-ab05-f4519c0ff66a/seasonal_affective_disorder_medical_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a801326c-d9ec-4970-9476-18dd650bcefb/23047690721.pdfIn PDF document text
    • https://6754c94d-8795-460a-880d-d127bb37d4d4.filesusr.com/ugd/2383dc_c07a3bf94fdc4b778e24f281045d07c0.pdf?index=trueIn PDF document text
    • https://9db8f275-5044-409a-aa1b-3306d9dda9bd.filesusr.com/ugd/361f4b_fe078659b67a46d29a0343e7dc97e380.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBE 4852 bytes
SHA-256: 36460edad303819d28ec4c0987a287ebe03fbbf4d589f89b1cb0d200b173aea6
font_01_sfnt_off0000fd52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD52 6044 bytes
SHA-256: d67301e44ac532c3dd098d2703ea1f4a24a1f2319e9e7c2c19a307a4baa40d00
font_02_sfnt_off00010cf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF3 10504 bytes
SHA-256: 8b815aa9079eecbadb165b202fe63a9ebf49a0d7a76ae85b1094d9390b3424c6

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