Malicious PDF — malware analysis report

Static analysis result for SHA-256 891c21436e74b495…

MALICIOUS

PDF

71.9 KB Created: 2021-02-16 19:30:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 9a01a179ae0e936dbe5fa4c720d0bfcf SHA-1: dcb3333e33fcb809da1849ebf1ef5b907761c721 SHA-256: 891c21436e74b4956b3e815f5a1ad2e1ec2134957661b8d223706afd2f7d18f0
214 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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) or Microsoft license-boilerplate 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://yafferge.ru/wix?keyword=south+lomei+labyrinth+island+map In PDF document text
    • https://cdn.sqhk.co/guxuboru/jhjFpjj/vunawiwameragi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420917/normal_60047bf0c5b91.pdfIn PDF document text
    • https://cdn.sqhk.co/pulununese/9Fk5Zgc/derwent_inktense_pencils_24_tin.pdfIn PDF document text
    • http://rajedat.iblogger.org/peseri.pdfIn PDF document text
    • https://cdn.sqhk.co/nopavoboriru/Clifjad/live_call_voice_changer_for_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/fafujedajir/dxd1PPB/my_bt_account_login_business.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384471/normal_602453d0120cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409814/normal_601751f70ef5a.pdfIn PDF document text
    • http://didavixakodix.22web.org/marantz_tape_deck_for_sale.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dixasimoxipux.rf.gd/timom.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/anaerobic_spore_forming_gram_positive_bacilli.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/xazugalugiremavekituzimi.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/allied_waste_recycling_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/bumblebee_toys_transformers_1.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/20461615227.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/walinebuvisefulo.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/gina_2019_asthma_report.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/baskerville_bt_bold_italic_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/zyclara_dosage_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/miwuzubefefepujipikipeb.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_off0000ddba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBA 5544 bytes
SHA-256: 450c11d668fca21dbdb77f3bf64493bef7ce910b61e35cd52b8cbbe4562b167b
font_01_sfnt_off0000f05f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05F 9948 bytes
SHA-256: 4fffd3a1d3c2c25c6dd7112e11205816c9fcc406d7a93c6920ed17c25bceb036