Malicious PDF — malware analysis report

Static analysis result for SHA-256 68513bf75ff3178b…

MALICIOUS

PDF

74.7 KB Created: 2021-03-17 20:45:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1670fc71e10e31753f36006cd480e09b SHA-1: 9762a9bf748c2962d97c91a2d923408ef1f0eb89 SHA-256: 68513bf75ff3178b4f2b472286b934f2fb781fb22cd9807ae14f6f8859b1b3d6
186 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 0.9997

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://fokemale.ru/wix?keyword=minecraft+0.13.0+apk+download PDF link annotation
    • http://janexik.22web.org/40099881857.pdfIn PDF document text
    • https://tigasedoxopafu.weebly.com/uploads/1/3/4/7/134707490/fitimuxarepewedoxaja.pdfIn PDF document text
    • https://paporese.weebly.com/uploads/1/3/1/0/131071113/09428dc2c182f5c.pdfIn PDF document text
    • http://jitokinut.iblogger.org/tatalaksana_jantung_koroner.pdfIn PDF document text
    • https://fabezetenonuke.weebly.com/uploads/1/3/4/8/134846610/dovovigabepupa_tiwakew_sisadobanomija.pdfIn PDF document text
    • https://serewutedirafam.weebly.com/uploads/1/3/5/3/135339767/e38074ea3.pdfIn PDF document text
    • https://nokafixawawi.weebly.com/uploads/1/3/1/6/131606940/6bbb778ab7c3.pdfIn PDF document text
    • https://rebazizezasij.weebly.com/uploads/1/3/4/5/134586802/xulix.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/kijelopazekune/rilamimunopotex.pdfIn PDF document text
    • http://vufobaratoja.epizy.com/19020661600.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/15062218524.pdfIn PDF document text
    • https://d5e9a058-cbdc-4968-ba72-30cdbf1e36a3.filesusr.com/ugd/9cfd0a_5b823eedd60b492da9bdf63229c0afb6.pdf?index=trueIn PDF document text
    • http://fakuvamikopevi.rf.gd/berokolulijuxorinaw.pdfIn PDF document text
    • https://b615eccc-4413-4b1d-8109-ede925130a83.filesusr.com/ugd/0994f9_3f706c06b8d64564bb015e2078fea980.pdf?index=trueIn PDF document text
    • https://4b4ea461-5266-411b-8735-d5290551f550.filesusr.com/ugd/7fedcf_21aa735180ef4ce7adeca9ad6d49c746.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/guxosa/new_assamese_video_album_song.pdfIn PDF document text
    • http://pafelimebamat.rf.gd/guxuniworuruzunidixoju.pdfIn PDF document text
    • http://tojevonabekaja.epizy.com/lomak.pdfIn PDF document text
    • http://wenimawibi.epizy.com/how_to_turn_down_pilot_light_fireplace.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/gepopisivewufal.pdfIn PDF document text
    • https://a2ae8793-a99f-480d-a3bc-849ef63d34f7.filesusr.com/ugd/cc207a_69406675a88148a8ae781abbb75112a2.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_off0000e84b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84B 5520 bytes
SHA-256: dc38950ff019285264ad677d580730f4f4a137441f3c6bb0d2259cde0ec4e8ba
font_01_sfnt_off0000fb50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB50 10060 bytes
SHA-256: dca20ef1c1cfe783361a6c6c442b76eb146879853ac6eb78cc9095a8706cc5de

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