Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c56f7036b9dbc08…

MALICIOUS

PDF

74.0 KB Created: 2021-04-16 11:30:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: c89729d1ad47aef659f321c90e7e9577 SHA-1: 2ef5e41e6be79761ba4f191ebb470d25bef5f5f4 SHA-256: 9c56f7036b9dbc08212461eddcb06e510334ecddc02751059c9fc064529b1a11
234 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a link farm. The ML classifier strongly flagged this PDF as malicious. The presence of embedded URLs and the callback lure heuristic suggest the document is designed to trick the user into visiting a malicious site or potentially engaging with a scammer, which is consistent with phishing or social engineering attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://dafemum.ru/strik?utm_term=nys+driver%2527s+manual+spanish In PDF document text
    • https://vesabigixovo.weebly.com/uploads/1/3/1/8/131857304/dedizagira.pdfIn PDF document text
    • https://cdn.sqhk.co/jobubexivex/ghhaTjj/find_my_phone_by_android.pdfIn PDF document text
    • https://cdn.sqhk.co/mugukawi/dUiahhz/futuvuviropakozug.pdfIn PDF document text
    • https://cdn.sqhk.co/pozigafo/vhjejaR/vogep.pdfIn PDF document text
    • https://cdn.sqhk.co/lizuloka/i6Hid9q/aalayal_thara_venam_remix_song.pdfIn PDF document text
    • https://cdn.sqhk.co/rifojimuna/hidhaav/bts_song_offline_download.pdfIn PDF document text
    • https://buzapakamewogu.weebly.com/uploads/1/3/4/3/134366326/kisigovubodufaji.pdfIn PDF document text
    • https://cdn.sqhk.co/zizenozi/Qie2jf3/super_cobra_jet_intake_manifold.pdfIn PDF document text
    • https://cdn.sqhk.co/pufuxogife/4hdhbhg/lenevevizo.pdfIn PDF document text
    • https://cdn.sqhk.co/luwivimexu/ihhcgdy/98873440726.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxagoxoman/FnBqgdP/school_merit_certificate_template.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b785f725-25cc-4b4b-b44c-60bd45eb2f54/farafakirimigovanofuw.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/directory_path_traversal_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/89943653959.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34539bd2-1f44-4f66-8e15-9e76f90594e2/noroz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b75d809b-ace8-4e07-88d8-f5cb1012eb1c/moto_g7_play_camera_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/564db469-5f7c-41f8-90ea-298fcb816a82/uk_food_safety_alert_news.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/formos_amritsar_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/fawuputifun.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/paniwigexiv.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FD 5364 bytes
SHA-256: 7ca92d5c75def073e4d51f115f4918c82d085180ac543b204315c0d912476145
font_01_sfnt_off0000f327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF327 12192 bytes
SHA-256: 02e6b12edc24c5a5ecaade7e6ea5a3fd3303e0ebbc80aa297fd511a423866e08

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