Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cca5dd8b743ccd8…

MALICIOUS

PDF

74.0 KB Created: 2021-02-21 04:41:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9c6e4d550cd21e0b1d0f273d673bf1c5 SHA-1: 4a77d8b275c100c01eb2c052949c097d5157ef27 SHA-256: 2cca5dd8b743ccd85d463d3803a2c2dcbae7c6e3337914c91177ddb4fcd70b75
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF containing multiple embedded URLs, many of which are hosted on disposable domains, suggesting a link farm or phishing lure. The heuristic 'SE_CALLBACK_LURE' indicates the document content is designed to trick users into calling for support or resolving a dispute, consistent with phishing or scam tactics. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://baarspo.ru/123?utm_term=what+is+a+shadow+job PDF link annotation
    • https://cdn.sqhk.co/zotiperugi/wiajhRm/jemel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484097/normal_601fe0e43e014.pdfIn PDF document text
    • http://24goodstore.site/tropico_6_dlc_plans36s2k.pdfIn PDF document text
    • https://cdn.sqhk.co/wifinalimow/6TsEeie/tentacle_wars_3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464311/normal_5feaf27a331da.pdfIn PDF document text
    • https://cdn.sqhk.co/gegenosuzun/al1niij/6536978831.pdfIn PDF document text
    • https://cdn.sqhk.co/ramidazumiko/gfgiTNr/ruwutasujorobowozafatab.pdfIn PDF document text
    • http://damizav.iblogger.org/natisuzemawumaranuj.pdfIn PDF document text
    • http://help-bluebadgecenter.com/fear_the_walking_dead_season_1_castw6d7y.pdfIn PDF document text
    • http://websecurer.tech/bisilikonunurosurirazogif1trzw.pdfIn PDF document text
    • http://astropsychology.website/lozisifetoxutugediuzk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wovefekekixuji.rf.gd/icaap_ilaap_guidelines_ecb.pdfIn PDF document text
    • http://wedizakur.epizy.com/zaralafimalotamav.pdfIn PDF document text
    • http://winulesodix.rf.gd/96576792685.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/74971768453.pdfIn PDF document text
    • http://rikonuge.rf.gd/101_weapons_of_spiritual_warfare_free_download.pdfIn PDF document text
    • http://zugejono.epizy.com/juripumalipaka.pdfIn PDF document text
    • http://mevanuzexujen.rf.gd/video_maker_with_music_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/safago/nivinokugibivenozufibo.pdfIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FE 4668 bytes
SHA-256: ffb766df324f80b1ab947545221cfcb8d1e72c4dbd1dcae655bd5256dcef554f
font_01_sfnt_off0000e9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F6 10252 bytes
SHA-256: d7492d5150ef7e4bb3bfcf40d2eab9fcde4e71c01eb016e17f9f167b746940c4
font_02_sfnt_off00010cf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF6 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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