Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc5df19caeb527ac…

MALICIOUS

PDF

79.2 KB Created: 2021-04-08 02:14:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 10e24ee8dd9e182182985229b281223a SHA-1: 24f12fade441838c064621ce5c5ce2f27e9dc2d5 SHA-256: fc5df19caeb527ac0c290eb1678a9054389e65d03ce46d79491c088f0e994cce
134 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a link farm and uses an urgency lure, suggesting a phishing or malicious download attempt. The embedded URL points to a suspicious domain, and the ML classifier strongly flagged it as malicious. While no scripts were directly extracted, the PDF structure and external links are indicative of a malicious document designed to redirect users to potentially harmful content.

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://gimoguvi.ru/strik?utm_term=how+to+turn+dating+into+a+relationship PDF link annotation
    • http://abreudesigns.com/optimus_prime_truck_for_salex5jmt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427080/normal_602f98d662781.pdfIn PDF document text
    • http://heliusdesign.ru/bollywood_romantic_song_video_freepb9q5.pdfIn PDF document text
    • http://eeeeeyyy.space/uniform_partnership_act_definition_economics6k90a.pdfIn PDF document text
    • http://oneitshop.info/fishbone_diagram_template_for_educationjzgkg.pdfIn PDF document text
    • http://just-gopro.com/sylvia_day_one_with_you_audiobookd5tex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427267/normal_600c881abeb30.pdfIn PDF document text
    • https://sovajavab.weebly.com/uploads/1/3/4/0/134041947/kagipi_punezuv.pdfIn PDF document text
    • http://mylic.ru/zutatalobopagaxoip00m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393348/normal_602fedee2036a.pdfIn PDF document text
    • https://pofisuxix.weebly.com/uploads/1/3/4/0/134016862/dufis.pdfIn PDF document text
    • https://bakijunida.weebly.com/uploads/1/3/2/6/132695635/170f0a57cbcbf8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427820/normal_5ff65d4652217.pdfIn PDF document text
    • http://onlinetiser.website/amor_y_respeto_emerson_eggerichs_descargarfas14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456389/normal_604a171498cfa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/40277726336.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/majjhima_nikaya_deutsch.pdfIn PDF document text
    • http://mogowekuweda.epizy.com/82028805668.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/emulator_gba_android.pdfIn PDF document text
    • http://favuzokusom.rf.gd/chandrakanta_novel_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/destination_a2.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_off0000f582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF582 5272 bytes
SHA-256: cde80ff2bafd01f2c17339b4319711a3925a41c826d900f46270aa046497707a
font_01_sfnt_off0001077b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1077B 11448 bytes
SHA-256: c7c321efa30e95ae8fc57a176a7d7c1da30d4d70c43a752c24df25328ccb1c1c

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