Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3e135fad78526ec…

MALICIOUS

PDF

70.9 KB Created: 2021-03-12 08:44:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d84ba31ecb5f8230522de485c7ec4571 SHA-1: 110760033688aab48d854d7229704c7ec5c6438e SHA-256: e3e135fad78526ec1200c1802361fb41c39eb502002270c76a9b125b480a7ec2
146 Risk Score
Tags
free-cdn-ebook-manual-lure

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. It uses a callback-phone (TOAD) lure. 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 0.9998

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://zajinet.ru/award?keyword=bcit+burnaby+campus+map+pdf PDF link annotation
    • https://zoximubovug.weebly.com/uploads/1/3/1/3/131379564/gotamivota_pasavoserul_katisifadeje.pdfIn PDF document text
    • http://naxawevuvesij.iblogger.org/36407875393.pdfIn PDF document text
    • https://wafilanukeg.weebly.com/uploads/1/3/5/3/135309269/f3b15382649.pdfIn PDF document text
    • https://zikamesezelili.weebly.com/uploads/1/3/4/8/134857079/6795203.pdfIn PDF document text
    • https://bewanabexujafo.weebly.com/uploads/1/3/6/0/136050633/2476111.pdfIn PDF document text
    • https://xajevopo.weebly.com/uploads/1/3/2/6/132682124/memuxumada.pdfIn PDF document text
    • https://dabikosetizoje.weebly.com/uploads/1/3/4/2/134234987/mijakebizuzesopato.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/175e66aa-2437-45f9-ace1-8cd6a2153f23/how_to_interpret_line_graph_data.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ce60a20-1a10-469d-a19a-2170afa547c5/75613318917.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/are_there_really_missing_books_of_the_bible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fb4ca2f-689c-40f8-866e-43f6267ac97f/how_to_get_a_team_sponsored_by_nike.pdfIn PDF document text
    • https://24a70dd4-b549-4b9e-9c0a-6eea45ab85ad.filesusr.com/ugd/ab0c63_453f81921b084fdd904d04751c560329.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sixolose/81174423177.pdfIn PDF document text
    • https://bb55feb6-a0c4-48ae-8f72-aea2c45912f8.filesusr.com/ugd/b9801a_9d079978f14d4bb4955d42cccb02a683.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/lonujukulawo.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/benekularofulagapawiva.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/powiludojizux.pdfIn PDF document text
    • http://mosokiwilag.rf.gd/nican_mopohua_texto_original.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_off0000d911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD911 5560 bytes
SHA-256: 74437c3ef0460ad51085bd864eac4d174e426c466471154ec3bc173ac5aa76df
font_01_sfnt_off0000ebe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE9 10172 bytes
SHA-256: 396baa9d0e19199eedcc971e6c210ca2165fcf81a71139a84f641793479f3be3

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