Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b2e44a23a9eab80…

MALICIOUS

PDF

73.4 KB Created: 2021-04-28 18:42:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 90f79da85b9c8941968893afe0ceb69e SHA-1: 57d85d5ae1e57ee00d8b9b5226f983a534d7ee38 SHA-256: 3b2e44a23a9eab803cf21805b694d95cc4b1705618fd76fd52461a9ab39f6de9
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 0.9998

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://midufefew.ru/strik?utm_term=why+is+my+oil+light+flashing PDF link annotation
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://fipixavonusin.iblogger.org/artist_loft_metal_floor_easel_assembly_instructions.pdfIn PDF document text
    • http://organic-ita.space/11130793226xgken.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381090/normal_601b03d5aa10b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://01c19f78-c7d0-441a-b56a-8672493f87de.filesusr.com/ugd/9d66c7_0e223b27a1e543069ad6304125eb10ac.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5755a4db-643f-4107-bdad-b2cabb52afb9/71663674194.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e083103-a9b5-4b40-858e-23c658801209/kapuripulunagilukazu.pdfIn PDF document text
    • http://limopapelekoke.rf.gd/21462605108.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb1cc28a-a1a4-4c53-ab5a-51320128831a/dyson_dc26_price.pdfIn PDF document text
    • https://b09d99c6-da67-4e55-b5b3-baceba093817.filesusr.com/ugd/a69c6c_eac2310ef574493db62aa66949f29c74.pdf?index=trueIn PDF document text
    • http://podifugugak.epizy.com/fukuboxirajapuwuder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dea7634d-8a37-4349-b06b-c131498076a2/vozanifutusu.pdfIn PDF document text
    • https://dcd55a6f-f4d9-4ab7-9ea0-0dac4ffa5d6f.filesusr.com/ugd/f7cbe4_189f6012d6b74e07a94c125dd011a12e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0461e66c-22af-4c9e-84e3-780619ac063b/what_is_the_multiple_intelligence_of_scientist.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ef0ea51-01d6-49ac-96e2-4f3c8a0ada70/girlboss_sophia_amoruso_quotes.pdfIn PDF document text
    • https://ef9d90ca-5811-4a1c-810e-75bcfae60121.filesusr.com/ugd/a33af7_60ac2ca269a1471b8cf2c3a9998be058.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/16e34486-73b2-4c3e-a34e-c2e8bb6e7ea5/garmin_gpsmap_78s_manual_espaol.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_off0000e08b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08B 5200 bytes
SHA-256: 6dc73a7fe241718af4a4bf8c788e44bad0ba03336d3ebbd2fbe179efb8e33b8a
font_01_sfnt_off0000f22f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22F 11420 bytes
SHA-256: 12c9d2a9ccb826650c403cbaab30e579edc28ccd0bf7c254ad54353a981e71dd

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