Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fe8b86192925a14…

MALICIOUS

PDF

75.9 KB Created: 2021-03-22 01:34:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 984f8f2a95adc327770232f19a57818a SHA-1: 96e7f22508708e86131fbb0281ab509d7a2de0c7 SHA-256: 8fe8b86192925a14a0ce83e361a72740888c0928d544c30f5267b1f3f62ef80e
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/strik?utm_term=best+light+reads+2020 PDF link annotation
    • http://dufifudusimube.mygamesonline.org/8188955391.pdfIn PDF document text
    • http://frasqen.online/6244082811071swh.pdfIn PDF document text
    • http://vovpomnim.ru/22332246445cke0g.pdfIn PDF document text
    • http://stroy-level.ru/bohemian_rhapsody_trumpet_sheet_musicsdu2k.pdfIn PDF document text
    • http://felidefewipikig.22web.org/jusowuremozapidasun.pdfIn PDF document text
    • https://rebazizezasij.weebly.com/uploads/1/3/4/5/134586802/3178893.pdfIn PDF document text
    • http://fezomoworiva.22web.org/wokeriwewelimemimafumel.pdfIn PDF document text
    • https://xigologilajuveb.weebly.com/uploads/1/3/4/6/134672854/715563.pdfIn PDF document text
    • https://natutiwuv.weebly.com/uploads/1/3/6/0/136019317/c1e8d511e.pdfIn PDF document text
    • http://prechambre.xyz/45346522718pl2r0.pdfIn PDF document text
    • http://wamipivifubape.sportsontheweb.net/45851676981.pdfIn PDF document text
    • http://bellissimo.online/bauhaus_design_principles917e6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/juribeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e00aadd3-2a71-4cbc-a0cb-52cd152c4de1/pilosuzaxamudixedikovati.pdfIn PDF document text
    • http://pubupamosala.epizy.com/describe_yourself_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/wound_care_guidelines_2018_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9fc0005-73fe-4dd4-814b-2c85764f656b/64519327743.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e2030d6-95a8-4012-9093-c50382ba8e2f/fenunokapepaj.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ece4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE4 5408 bytes
SHA-256: 9477addcb6686b8083c2e5f30a1b3e670ad661276121afcf6295f4b445112eb7
font_01_sfnt_off0000ff3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3C 10504 bytes
SHA-256: 378ef00f32bedf038612203ef54a0a7a8273d2dc70a063a9d8845ab3b922157a

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