Malicious PDF — malware analysis report

Static analysis result for SHA-256 3055871edddc0ed8…

MALICIOUS

PDF

67.9 KB Created: 2020-11-14 07:52:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: be2009476fedd9d9e43c38930d4b9dcb SHA-1: 178bed1a90f3552a4c2b41c4b7257caa65a9b3ba SHA-256: 3055871edddc0ed88930478a792918e892cc1b31bf72480acfdbf9c860df489c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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 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://traffking.ru/strik?utm_term=carta+psicrom%25C3%25A9trica+altas+temperaturas+carrier PDF link annotation
    • https://wajodaxomunav.weebly.com/uploads/1/3/4/6/134625674/6239804.pdfIn PDF document text
    • https://nifosigi.weebly.com/uploads/1/3/4/4/134488788/golel.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/pevatupesa_faxurorelotarom_segemevixuvaxe_sudefigi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368971/normal_5f939a958195f.pdfIn PDF document text
    • https://pexulowiseguwuz.weebly.com/uploads/1/3/4/3/134391342/lajilumodalefolixalo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449421/normal_5fa39ba2e054c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484169/normal_5fab64c74de12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446045/normal_5fab2983baccf.pdfIn PDF document text
    • https://vuvajufuzuno.weebly.com/uploads/1/3/4/4/134480129/moginodupetako.pdfIn PDF document text
    • https://jobubati.weebly.com/uploads/1/3/1/4/131453688/9010717.pdfIn PDF document text
    • https://zutofamofiselas.weebly.com/uploads/1/3/4/0/134040676/7257298.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://uploads.strikinglycdn.com/files/480983ae-4b25-4cab-b0df-ff763933b8da/rius_para_principiantes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfe0e0a5-db1c-4224-bb48-75f2bea1addb/zawaligatumifelop.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC5D 5020 bytes
SHA-256: ffd120abd9b591a0f0cec3bc68556b4f822890fc716582ead3c3d6210d2fda45
font_01_sfnt_off0000cd2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD2F 11284 bytes
SHA-256: c64045f1cfb204ca15fab39e82504991b6d1446cdc8a14849582d1621e0fc560
font_02_sfnt_off0000f1ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EF 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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