Malicious PDF — malware analysis report

Static analysis result for SHA-256 35e2a9cffcceee27…

MALICIOUS

PDF

74.5 KB Created: 2020-11-21 22:49:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 22a346f320619c33fb464bc01084f781 SHA-1: 1f9b12b612a7da460a7fbf5e9e7c651f4b7bc539 SHA-256: 35e2a9cffcceee27762ce52881c3a714a124594921147e67f794314d5ca2585e
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 0.9996

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://trafftec.ru/123?utm_term=dragon+ball+devolution+unblocked+76 PDF link annotation
    • https://tebebutak.weebly.com/uploads/1/3/4/7/134744698/9270781.pdfIn PDF document text
    • https://kutowovazamil.weebly.com/uploads/1/3/4/3/134362820/a009d0010661a10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372376/normal_5f8acbd543004.pdfIn PDF document text
    • https://niwewuvikade.weebly.com/uploads/1/3/4/6/134629185/jumufasipusus.pdfIn PDF document text
    • https://subapusufi.weebly.com/uploads/1/3/4/6/134649014/didedisawakusalari.pdfIn PDF document text
    • https://titawijuneve.weebly.com/uploads/1/3/4/0/134012454/xovob.pdfIn PDF document text
    • https://jijalasigode.weebly.com/uploads/1/3/4/3/134344414/gowumosofawuxene.pdfIn PDF document text
    • https://ligofaxudatejot.weebly.com/uploads/1/3/0/7/130739538/6af61322e242.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387224/normal_5f93d876c5679.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/8537505.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/ad63c067-467b-46fa-87a8-94bf8f78c848/xerubetagu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a18e1be6-7251-4c65-b1f9-ced53d8a545d/distance_and_displacement_worksheet_physical_science.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b386849-6a21-46a9-b203-c3eddc3d0829/moon_bitcoin_free_faucet.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cefa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEFA 3016 bytes
SHA-256: cbb52481ce94e16f1aa7c1e5556943e0858c32639ae52c58d7d3596933ba349e
font_01_sfnt_off0000d9b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B6 5308 bytes
SHA-256: 14415e1274d5cf2df83972c9d92dd9bf1dc9fd8864a43d4b45360ec5821b41be
font_02_sfnt_off0000ebde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDE 10016 bytes
SHA-256: d2df8892516cafecc0c7c1a282847cf17cb7b57811d877c834336c1c9ba57caa
font_03_sfnt_off00010e42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E42 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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