Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a6b9d323b799c2b…

MALICIOUS

PDF

81.7 KB Created: 2021-05-16 06:40:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 52df346752e0ce23b4925b5a514e7fe7 SHA-1: 3191823a2514a20922ac21209da688fbe80d2444 SHA-256: 3a6b9d323b799c2bc1070da268d34dcc6a893b217accd64dfc97efa581b4e2c0
176 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 0.9991

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 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.
  • 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://jumiwimov.ru/strik?utm_term=coleman+lantern+cpx+6+instructions PDF link annotation
    • https://kerozusokenizil.weebly.com/uploads/1/3/1/3/131383247/nigibakadinikosav.pdfIn PDF document text
    • http://merogerofame.66ghz.com/61005128762.pdfIn PDF document text
    • https://cdn.sqhk.co/sixepatexup/ahbgjjb/hit_run_steal_tee_assembly.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470017/normal_60172e879ff99.pdfIn PDF document text
    • https://momimuraw.weebly.com/uploads/1/3/1/3/131384495/7011231.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495684/normal_606b21a6c92d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417422/normal_5feb0d66b8da6.pdfIn PDF document text
    • https://wepovibixig.weebly.com/uploads/1/3/4/0/134040587/parufulupozopef-josokokibixo-buxosomu.pdfIn PDF document text
    • https://cdn.sqhk.co/xolofiwano/idOgeHG/57637228802.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455196/normal_6028b2f432c4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480581/normal_605c96c85b27e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vanejefikikerem.epizy.com/bowflex_pr1000_home_gym_dimensions.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/cell_cycle_and_cancer_webquest_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/list_of_black_gospel_praise_and_worship_songs_2018.pdfIn PDF document text
    • http://gagemusogigubew.epizy.com/73509580365.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/how_i_met_your_mother_barneys_playbook_episode.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/70012284989.pdfIn PDF document text
    • http://lafatakijuton.epizy.com/36838415199.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/the_kiss_of_deception_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/fojoxa.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/how_to_go_to_the_boiler_room_re2.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/is_down_and_out_in_paris_and_london_fiction.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/ligne_330_guide_d_impot.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/goterudubuzuj.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_off0000ff42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF42 5208 bytes
SHA-256: d302928ed0310abd1bfa3b062b0ca9aeaf7d2bf8bdffd2c0eca7e102ff3ae2d9
font_01_sfnt_off000110d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D6 12432 bytes
SHA-256: a087533dbc0e23b385194cb01cb1d61785bb6f6cd90348da8038a4311884491b

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