Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1ab0976bf226466…

MALICIOUS

PDF

76.5 KB Created: 2021-03-05 12:33:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c9265581d358fbfdb8f83b6d9634f353 SHA-1: 76e81ab508ffcbde309be1f570eec33b7577123e SHA-256: d1ab0976bf2264661a8274a85c25444b035dc61d246dd7a06a35e6f3f5d01a91
146 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soxebez.ru/123?utm_term=acca+accountant+jobs+in+australia PDF link annotation
    • http://obschee.xyz/free_iq_tests_with_answers_and_explanationstmiar.pdfIn PDF document text
    • http://murerejomijuv.22web.org/20986946488.pdfIn PDF document text
    • http://5euro.info/best_auto_mechanic_bookspuqjw.pdfIn PDF document text
    • http://firstreadersclub.com/cisco_anyconnect_secure_mobility_clikyq9o.pdfIn PDF document text
    • http://ketorebagibof.22web.org/79197961454.pdfIn PDF document text
    • http://medtechnika1.ru/best_sims_3_store_setsghd6k.pdfIn PDF document text
    • http://trychambre.xyz/gaggia_classic_pro_saleduxlp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wubogijogazerew.epizy.com/xuxerikunisono.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64cd40b8-24fb-40f3-af0b-927e5abba97b/69187876928.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/baa_baa_black_sheep_poem_video.pdfIn PDF document text
    • http://peragodifi.epizy.com/70937492873.pdfIn PDF document text
    • http://pitowurojagit.epizy.com/90188785690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bd46f4e-4cb7-4926-a507-38087aebb390/4288805959.pdfIn PDF document text
    • https://s3.amazonaws.com/toniseligiwuzux/badmaash_company_video_song_hd_free.pdfIn PDF document text
    • http://bepinutarefe.rf.gd/50314799420.pdfIn PDF document text
    • https://s3.amazonaws.com/neporezofov/58321984092.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/decff859-ee37-4d24-b3e8-035e663dc041/how_to_calibrate_apc_smart_ups_3000.pdfIn PDF document text
    • http://tajafex.rf.gd/sobigunelirodano.pdfIn PDF document text
    • http://nexoluximil.rf.gd/dibafalokejesulogino.pdfIn PDF document text
    • http://wetizizokixo.epizy.com/migozilepuwade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7176a899-9e03-4b41-bf1e-9c4c09d557d8/cronica_de_una_muerte_anunciada_pelicula_completa_hd.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_off0000e27d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27D 3068 bytes
SHA-256: 80ffce03558c3ca97ee9d4e807f17b60de73f3997ed023840d5be88c92e3f5f0
font_01_sfnt_off0000ed7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED7D 4996 bytes
SHA-256: 5d041e607edd94a44802c0b2a5fc9f3b1f2bc918c8b98fc09fc17ffa9f225b99
font_02_sfnt_off0000fe8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8A 11116 bytes
SHA-256: 1ca4af3be3351161cde54da9b8f9a34c41892dc53cade53c874650a14a16a712

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