Malicious PDF — malware analysis report

Static analysis result for SHA-256 e51f916d12a2ae18…

MALICIOUS

PDF

74.2 KB Created: 2021-02-17 14:51:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ac7e414b9f9f2415f8780d37c3762206 SHA-1: f0aea1e207545aae56ab10a733618614a2ffad11 SHA-256: e51f916d12a2ae183d02ffc2147008cac23a8b172a9e35ddea5c4972296a036d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9995

Heuristics 5

  • 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.
  • 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://baarspo.ru/wix?keyword=gotranscript+test+answers+2020+march PDF link annotation
    • https://cdn.sqhk.co/gobajejuz/S9ijtgg/class_10_english_solutions_first_flight_chapter_4.pdfIn PDF document text
    • https://cdn.sqhk.co/fajoliteve/eSCOSb1/barofetazoto.pdfIn PDF document text
    • https://cdn.sqhk.co/semobisugigi/jG8Swji/89982476189.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481166/normal_6008033776059.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486051/normal_6014593842013.pdfIn PDF document text
    • https://cdn.sqhk.co/fezivabuja/0lghRVl/30097424330.pdfIn PDF document text
    • https://cdn.sqhk.co/dolitife/hckwgef/football_official_uniforms.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473619/normal_5fe91eb82b3aa.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/3jaQ0YP/74728110686.pdfIn PDF document text
    • https://cdn.sqhk.co/turaxulefa/eSieUgi/bike_race_bike_blast_rush_descargar.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kipamorilezux.epizy.com/raj_avni_photos_free.pdfIn PDF document text
    • http://faruvesisok.rf.gd/manual_da_cbx_250_twister_2008.pdfIn PDF document text
    • http://wokoguzesel.rf.gd/autocad_dynamic_blocks.pdfIn PDF document text
    • https://s3.amazonaws.com/runuzitexokol/vatedufanagedezefizun.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/61681784999.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/dizabudiboposawaxile.pdfIn PDF document text
    • http://pidejekakej.epizy.com/wokikojurof.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/tamil_astrology_software_free_for_android.pdfIn PDF document text
    • http://potefedezazox.rf.gd/muzivuzevomixijejas.pdfIn PDF document text
    • http://tilufisarulisa.rf.gd/mixat.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/34955322405.pdfIn PDF document text
    • http://pifetipopazemex.rf.gd/how_to_add_transitions_to_multiple_clips_in_premiere.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A0 5540 bytes
SHA-256: 778147b7b21ebcb5bb74704e75260ef48b974f4be6ece3f72442d3a17be57237
font_01_sfnt_off0000f962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF962 9844 bytes
SHA-256: a12e2761b1c29dc240236499ee6989513357b766f46bbe7b478ccec4bdf23482

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