Malicious PDF — malware analysis report

Static analysis result for SHA-256 e604540d30e47c21…

MALICIOUS

PDF

75.9 KB Created: 2021-03-10 03:28:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9f9829fdc2ca4af205969acfad54359f SHA-1: 10e0f16d284eb9366e3b86452e87772ab07db1ad SHA-256: e604540d30e47c21a1f96f29261fa3bbc31dfbd5c50ad4e898d0d6962222d71c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document exhibits characteristics of a link farm, with numerous external URLs embedded within its structure. The presence of a high ML score and ClamAV detection strongly indicates malicious intent, likely for phishing or distributing further malware. The document's primary function appears to be redirecting users to potentially harmful external sites.

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
  • 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://pelibifir.ru/123?utm_term=zigzagal+guide+civ+6+gathering+storm PDF link annotation
    • https://cdn.sqhk.co/mapibeze/sHM7ib2/rilakivuja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425214/normal_60465bc122d1e.pdfIn PDF document text
    • https://cdn.sqhk.co/tixukiko/thjZHgg/10825269667.pdfIn PDF document text
    • https://cdn.sqhk.co/zozusexub/ugijfha/virtual_regatta_inshore_keyboard_controls.pdfIn PDF document text
    • https://cdn.sqhk.co/dowamagova/jdgf2hj/wubugakazawaxevadewix.pdfIn PDF document text
    • http://fuvesozufinefi.medianewsonline.com/what_is_2_normal_form.pdfIn PDF document text
    • https://cdn.sqhk.co/netimawifes/ifKiigi/lofowegiduderi.pdfIn PDF document text
    • http://dojemop.mywebcommunity.org/how_often_should_you_lift_weights_over_40.pdfIn PDF document text
    • http://xonejalevesezom.sportsontheweb.net/62355975110.pdfIn PDF document text
    • https://cdn.sqhk.co/vefoveted/oBjibud/77410493864.pdfIn PDF document text
    • https://cdn.sqhk.co/sepokafaru/jjhi1jj/48334171728.pdfIn PDF document text
    • https://cdn.sqhk.co/jugemito/dOEhfgd/rc_neon_turbo_racer_lightning_mcqueen_met_licht.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479916/normal_5fd734deea661.pdfIn PDF document text
    • https://cdn.sqhk.co/juvanejejuwo/2ghpeMC/72531986525.pdfIn PDF document text
    • https://cdn.sqhk.co/gewewoturila/xHejeJi/jatipepisilurowimisazu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://502f924d-676a-41b3-8220-87c01882f600.filesusr.com/ugd/5a20bb_0bbfa3e7e18d467aabebf4168166c6c8.pdf?index=trueIn PDF document text
    • https://f72b89be-0fa6-41ee-8162-331329ef78ce.filesusr.com/ugd/95089d_c731b7810bcd45e3a6bd41642964554d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dudurat/54667583741.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/autoclave_hirayama_hve-_50_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/precalculus_with_limits_4th_edition.pdfIn PDF document text
    • https://cc4f1b1a-08c7-467e-bb5a-e3073ad8caf1.filesusr.com/ugd/ffc175_a0572f59801e41f484429c26818ae213.pdf?index=trueIn 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_off0000eaa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA3 5576 bytes
SHA-256: 320e179785bdf5c68dc16292aa2718245224bc2dba9f3bb70968194318d3bab1
font_01_sfnt_off0000fd7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7C 10736 bytes
SHA-256: 25527d34dc5fc803b2edb671766004d89e23eb794055bc9024a40544442f3a43

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