Malicious PDF — malware analysis report

Static analysis result for SHA-256 7be6cff39bca6306…

MALICIOUS

PDF

74.6 KB Created: 2021-05-19 06:34:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4286474dd9af1a439d860b7b9a452f27 SHA-1: ed50fbdc6e269e1e5467f51ff0da9ac2b08b05c8 SHA-256: 7be6cff39bca63061b3c7c5336a414a0767e40c4b005f7aa20300ef6b19fe3b2
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/strik?utm_term=como+programar+control+de+directv+un1 PDF link annotation
    • https://fafotarume.weebly.com/uploads/1/3/1/0/131069904/liravaji-xegigana-nizefali-juvoje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381321/normal_604b064f8fec3.pdfIn PDF document text
    • https://gifoxulexup.weebly.com/uploads/1/3/4/8/134865115/nameziju.pdfIn PDF document text
    • https://nofokupefuw.weebly.com/uploads/1/3/4/6/134695722/305cb.pdfIn PDF document text
    • https://telarosiz.weebly.com/uploads/1/3/5/3/135318094/bazuzanatobo-gobunekisaz-tedolijewamafed-bemorijavotafel.pdfIn PDF document text
    • https://sowofinonapira.weebly.com/uploads/1/3/4/3/134361296/kaxamofezatofovun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415951/normal_5fc9a5e34a0d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382631/normal_5fd60c3692ece.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454558/normal_6018e28f470dd.pdfIn PDF document text
    • https://pasiwuguvode.weebly.com/uploads/1/3/4/6/134601834/6070930.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493209/normal_5fd2fe536dd6f.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/5014a78d-0d7a-4955-a912-ea62a71cf103/71638930354.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/morasirekokele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c313dcc0-e5f3-4400-a347-2d58fac602c9/what_to_know_when_buying_an_existing_business.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/how_to_change_trans_fluid_on_2010_f150.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/1100_words_you_need_to_know_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a051cc3-4514-4b8d-a1f8-100d856cf2fa/sokasebu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77ad271d-1e46-428a-94c2-4e4f46c5b5fe/how_do_i_connect_plantronics_to_my_computer.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/video_bts_airplane_live.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16543c12-9bf8-412b-906c-1ac63f2c176d/fozokijokaragagegumuxas.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_off0000e2a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A7 5232 bytes
SHA-256: 350cb5e6cdfe840b6b9c29ad06571561210e20d6f90c8049a193ae689a1f5a26
font_01_sfnt_off0000f462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF462 12132 bytes
SHA-256: 1c796ed09df4c126fde16b264a957f753246c28b627df16358d4949088e372c7

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