Malicious PDF — malware analysis report

Static analysis result for SHA-256 53e4be5406732867…

MALICIOUS

PDF

96.8 KB Created: 2021-03-10 20:05:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1819d223a265ca3389bd15643bd94941 SHA-1: 2407923ecb944882eaf7d79c28e6952f0b4c2276 SHA-256: 53e4be54067328675991af47a60827007383de96dea31abfdda823fae1bf6f98
156 Risk Score

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 0.9994

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 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.
  • 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://nipisod.ru/aws?utm_term=sistema+endocrino+organos+y+hormonas PDF link annotation
    • https://cdn.sqhk.co/jisaside/djdiijc/how_to_make_chicken_goulash_soup.pdfIn PDF document text
    • https://luvatuxi.weebly.com/uploads/1/3/4/3/134321506/kunuk.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/SodjYha/beef_stew_packets.pdfIn PDF document text
    • https://cdn.sqhk.co/womibakok/5hfm4gD/20767937115.pdfIn PDF document text
    • https://zovezeko.weebly.com/uploads/1/3/4/6/134697242/zemagi.pdfIn PDF document text
    • https://sakaromef.weebly.com/uploads/1/3/4/5/134507496/3080056.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/mokamoba/efl_league_2_form_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/social_psychology_examples_in_real_life.pdfIn PDF document text
    • https://0a3c8164-ddd9-4522-8472-457ce31ece15.filesusr.com/ugd/d32f78_6f8bbacd858449f3a16a6b283d06a1f1.pdf?index=trueIn PDF document text
    • https://80172413-d145-4b71-b7cf-4a007d76ad29.filesusr.com/ugd/cacfd7_e6e6bee2f6054fd6bb100fdcc9fccf1c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kisagoz/tazinikijebimifuj.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/13921372480.pdfIn PDF document text
    • http://roxonotagake.rf.gd/janegobajelejunesasokerob.pdfIn PDF document text
    • http://ziritutu.epizy.com/how_to_use_a_sq8_mini_dv_camera.pdfIn PDF document text
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_c41064c624cd47618d2aa032bf63d841.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/davubewu/writing_equations_from_graphs_worksheet_6th_grade.pdfIn PDF document text
    • http://lajixowamimexo.epizy.com/31496981778.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/kokanee_fishing_reports_washington.pdfIn PDF document text
    • http://loxototo.epizy.com/pawogux.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/99492922059.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/34720869981.pdfIn PDF document text
    • http://kalotiwinilobiw.epizy.com/75117884308.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012d68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D68 5312 bytes
SHA-256: e043e1dde926a3f90a1e9b6e70b8d59a3a48d22c0ec76912a4e37e8048e281a5
font_01_sfnt_off00013f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F39 12088 bytes
SHA-256: a33be018f9ccc8a521743f940cae05f4e28f1078363f68f6a95e5b41c7a2bd6c
font_02_sfnt_off00016606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16606 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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