Malicious PDF — malware analysis report

Static analysis result for SHA-256 e98248354a72bb8a…

MALICIOUS

PDF

83.8 KB Created: 2021-03-18 09:42:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: bff5752a46de81d4ef9a3b790b976a1c SHA-1: 188551122f0d3e04876f5176fac072ff603d20b5 SHA-256: e98248354a72bb8aaf75492d1fdac2c1efd42138151a99270d248fde61a8f09a
186 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. 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 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/123?utm_term=lagu+cinta+adalah+the+overtunes+uyeshare PDF link annotation
    • https://juwememuju.weebly.com/uploads/1/3/4/5/134523402/fogujalefu_pekapaxaxuvadiw.pdfIn PDF document text
    • https://ziwuwozapa.weebly.com/uploads/1/3/4/5/134517717/bbaba03a5.pdfIn PDF document text
    • http://sakabeg.iblogger.org/32195792822.pdfIn PDF document text
    • https://zevijilutijeso.weebly.com/uploads/1/3/4/8/134850931/tuwazuzapatajopejom.pdfIn PDF document text
    • https://cdn.sqhk.co/dojopaxitovi/ia1jbB1/poutine_and_cream_milkshake.pdfIn PDF document text
    • https://cdn.sqhk.co/butuxolevu/ghhgiLC/92690978533.pdfIn PDF document text
    • https://cdn.sqhk.co/pabefidinaz/pjisXig/28089562594.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e40da922-b0e4-44be-9878-2d4898ccab21.filesusr.com/ugd/3a38e0_86025f2acf1d42c7b8a56b93c7a706a6.pdf?index=trueIn PDF document text
    • http://duwufinojitu.rf.gd/wivowojejut.pdfIn PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_0481944570554273a84e59a0e1c5a53f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a17c337-6f18-4494-9cb0-235e01311639/86071324565.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37d8d624-46c7-4e01-8e7f-089f46a4cb6c/52652805747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e12e9f0e-7f37-4bf9-a61c-95e186a72d1e/how_to_rig_bait_for_catfish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb9690cb-e5aa-400e-b3a8-dfdba040f7d0/73982483145.pdfIn PDF document text
    • http://ropasibemufi.epizy.com/32569926620.pdfIn PDF document text
    • http://kawozubugomolen.epizy.com/what_is_the_role_of_media_in_public_relations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf142cce-a22f-4d6f-af26-928e7910abcd/who_is_batman.pdfIn PDF document text
    • https://67258aaf-84c5-4a88-bfd2-1aa7ddb6c27a.filesusr.com/ugd/850f07_9e8f5c381d504047b0fcb1261fda9fb4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d11c0690-8bf9-44dd-b2ad-86ab2d6e52c5/numemavet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3fa9daf-60b5-433c-8531-a7f9cd7e1c87/xaziboz.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_off000108e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E4 5304 bytes
SHA-256: 14964a3c698396bc8d9a4ac5d54c5288005da49fca192266249a54e7d64b822e
font_01_sfnt_off00011af6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF6 11532 bytes
SHA-256: 4a7b4ccb13278831ca4f99f932b8ac70ef1692d8cfce3c3b064b9ef413fa7557

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