Malicious PDF — malware analysis report

Static analysis result for SHA-256 9592b1584a701074…

MALICIOUS

PDF

82.1 KB Created: 2021-03-16 01:59:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 802f9115badbd1f6aceff5f9ca403868 SHA-1: 989b31f1130baddb1727002097b7f2171f660b0b SHA-256: 9592b1584a701074e7a1c4e30afcdc3ede0c6d9efcf43b47d9a4eeef552175dd
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 0.9997

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://jumiwimov.ru/strik?utm_term=how+to+sync+my+bluetooth+headphones+to+my+iphone PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479705/normal_602bdae9d5efd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487647/normal_5fc6b92058888.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501989/normal_6047f5440d63d.pdfIn PDF document text
    • https://tonibakak.weebly.com/uploads/1/3/5/3/135346506/zosevoguvu.pdfIn PDF document text
    • http://bilapak.66ghz.com/jevarozu.pdfIn PDF document text
    • http://doweryklkq.space/50241045481uq0ft.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413469/normal_6024f0c34f086.pdfIn PDF document text
    • https://direwuberegenis.weebly.com/uploads/1/3/4/3/134361890/3247285.pdfIn PDF document text
    • http://getplafond.xyz/jeux_d_eau_piano_sheet_musico31hf.pdfIn PDF document text
    • https://lotopunukulel.weebly.com/uploads/1/3/4/4/134473418/jesekotuv.pdfIn PDF document text
    • https://zonerizarom.weebly.com/uploads/1/3/4/3/134310007/600e4e865b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://98771922-91e4-4673-aa0d-7794f4435593.filesusr.com/ugd/b6aaa0_9099d0bf77b441be84d04ddb5983e916.pdf?index=trueIn PDF document text
    • https://7f993087-45f6-41f4-96e5-9dcaca18fb91.filesusr.com/ugd/9a92dd_b46925537ba34139ba14cbe48766c003.pdf?index=trueIn PDF document text
    • http://sedubidazos.epizy.com/chottanikkara_bhagavathi_amman_padal.pdfIn PDF document text
    • https://bb74f61c-7045-47bf-9a7e-968101ee373e.filesusr.com/ugd/81ef4b_0d56f1587d564eeb96774594d89eb0b1.pdf?index=trueIn PDF document text
    • http://varomizabasunib.rf.gd/3507074544.pdfIn PDF document text
    • https://9df6e0af-a028-4e88-91ba-61a1b37318d5.filesusr.com/ugd/7c1f05_f43b318d29cd499eb95daedbe2b0429e.pdf?index=trueIn PDF document text
    • https://7e574f8b-ef34-4833-8dee-b18f3ac9fc91.filesusr.com/ugd/af8ffd_8c0be9e096ff4ff2b04181bfaae64ac3.pdf?index=trueIn PDF document text
    • http://lawurukipajuxe.rf.gd/wunaxikuxosax.pdfIn PDF document text
    • https://f1c0478e-57b3-422a-b8eb-433964b677d2.filesusr.com/ugd/16c17d_03de0c04e18c47a1b14988040d8e5c54.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_off0001013e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013E 5512 bytes
SHA-256: 849b4f1d4fa9ea6a45fd759d9d558af6b2b1659a920ba046a4b13bd3e704330b
font_01_sfnt_off000113e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E6 11444 bytes
SHA-256: dadb638215a0f180cf88b2a1ea0711490202c8109b2c4aba94d5dc5b332dead0

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