Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e411080e300dd5e…

MALICIOUS

PDF

76.9 KB Created: 2021-04-02 19:16:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 54cb834b2346711fc32d74f35b5925a3 SHA-1: 55707dd6559c4053c95ff3fee869908c2fe41761 SHA-256: 1e411080e300dd5ea004ecb0b5f66d9c440f984c25f90f45a7245ebc08feae09
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://mezovuduw.ru/123?utm_term=amazing+spider+man+2+android+apkpure PDF link annotation
    • https://cdn.sqhk.co/bogonelemid/t5IQiiJ/36578457900.pdfIn PDF document text
    • https://cdn.sqhk.co/totarujined/fgijdV2/nesira.pdfIn PDF document text
    • http://jaxixojuko.mypressonline.com/antibacterial_activity_of_flavonoids.pdfIn PDF document text
    • http://lamaded.mywebcommunity.org/xetinuvokajo.pdfIn PDF document text
    • http://zujuzerawijuk.medianewsonline.com/83233847659.pdfIn PDF document text
    • http://pifibunevivumo.iblogger.org/94918102832.pdfIn PDF document text
    • http://jesibijifinuz.mywebcommunity.org/56991643174.pdfIn PDF document text
    • https://cdn.sqhk.co/tokafumotebi/FVqjdAD/forabovetubexoposirojab.pdfIn PDF document text
    • https://cdn.sqhk.co/guranotup/fWgShdc/basketball_goal_in_ground_sleeve.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vakizonozajaxe.onlinewebshop.net/97294587655.pdfIn PDF document text
    • http://jototaniruf.rf.gd/antagonistas_adrenrgicos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d123d8bb-2bcf-456d-85fa-2ab4b24c5f51/how_many_100_bills_are_in_5_000.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d96de522-ebeb-48e2-9217-ebcd4f516ae5/lulepowizidusonagejef.pdfIn PDF document text
    • http://jefebewo.epizy.com/software_to_word_converter_online.pdfIn PDF document text
    • https://d427386d-3434-45d9-8802-370857a594f4.filesusr.com/ugd/accd1f_2a88ddd63dea4b62bfb448c8de1ee977.pdf?index=trueIn PDF document text
    • https://48bf584d-d56c-45cf-b4f3-c1c05dce5274.filesusr.com/ugd/3f4b99_5dd3e76b25174aa7a362780f13c82b91.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b124f428-9cb1-435c-b7cb-893060a6b6ce/60500523949.pdfIn PDF document text
    • http://ledufowi.myartsonline.com/generalized_anxiety_disorder_treatment.pdfIn PDF document text
    • https://ed8bc375-cd54-49ab-9ddb-988cb5b2fc3d.filesusr.com/ugd/3f3824_1f993e16b3ad4154aee4e2f6aed33267.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_off0000ee26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE26 5484 bytes
SHA-256: b73cd2222bb48f8983c30c4ddee67b50edfe39147cad0550061baac0e347f557
font_01_sfnt_off000100bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BD 11116 bytes
SHA-256: 12144f750cd78330a0d651386640e01601144a2e02583956074e7ab450faac70

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