Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed8e6442dd9bba92…

MALICIOUS

PDF

135.8 KB Created: 2021-04-25 03:08:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1eff07e9945d67eb9e9c19f1f9c0c9b4 SHA-1: c2e0e2c4a1fd3b0ac97fe1e4f44704be919f8ef1 SHA-256: ed8e6442dd9bba92a09ada079b47ebb2603f30120742d37a0f04ca25db36dfea
186 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. 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 0.9993

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.
  • 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.
  • 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://fokemale.ru/strik?utm_term=how+much+is+a+transmission+for+a+2008+chevy+malibu PDF link annotation
    • https://cdn.sqhk.co/woravejafeto/hfhiiDQ/animal_print_runner_pink_wallpaper.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413122/normal_603ef46757797.pdfIn PDF document text
    • https://cdn.sqhk.co/mopewedote/hdgiU66/saxozexugaraxave.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413977/normal_604d16291c7f9.pdfIn PDF document text
    • http://zelumefepa.sportsontheweb.net/lorop.pdfIn PDF document text
    • https://cdn.sqhk.co/pimepojuti/cxifhim/easy_learn_to_sew_patterns.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420431/normal_60481fc712bc5.pdfIn PDF document text
    • https://pupokidam.weebly.com/uploads/1/3/1/3/131381904/09e899.pdfIn PDF document text
    • https://xomikevogonenoj.weebly.com/uploads/1/3/4/7/134743799/jogomomeg.pdfIn PDF document text
    • https://cdn.sqhk.co/zutijujes/gdDicic/46543067218.pdfIn PDF document text
    • https://cdn.sqhk.co/nukunudakiju/eihghjf/59185522873.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416151/normal_5ff5db4d20d25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371799/normal_60513f4607347.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/jg6o2xz/crossroads_financial_fcu_mobile_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470232/normal_606ccd057ae56.pdfIn PDF document text
    • https://cdn.sqhk.co/kusedesomawa/hejfE6l/86275820540.pdfIn PDF document text
    • https://pufoxedoj.weebly.com/uploads/1/3/4/4/134438994/metilaweg_lugumoj.pdfIn PDF document text
    • https://vataripisak.weebly.com/uploads/1/3/4/6/134600115/7050601.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496602/normal_6012b94c25168.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404730/normal_5fca381d0d3e1.pdfIn PDF document text
    • https://cdn.sqhk.co/mezigiduze/407aYXE/aimpoint_pro_battery.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420775/normal_5ffb7411bb2b3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://koxolavomuzo.myartsonline.com/62880733068.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_off0001d879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D879 5944 bytes
SHA-256: f4ad3a8d5d7fe5b6d0274cac029b5011124d49895832c48737e790699faa5049
font_01_sfnt_off0001eca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ECA6 10696 bytes
SHA-256: f14e3c580cef98afde632d1eb387ca0e65c04e23dbe9c7db7a45ba173fbbc890

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