Malicious PDF — malware analysis report

Static analysis result for SHA-256 5daced2c7b24073b…

MALICIOUS

PDF

67.6 KB Created: 2020-11-18 10:03:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ac4f9e34f449e42f198d247a479532c1 SHA-1: 160dc2e8f04cea1f0a779f4b910455e5d737bf65 SHA-256: 5daced2c7b24073b2abcfa51bcd22d7f1a570742f33a81d5a6829112a4b78cc3
226 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a clipboard-command (paste-and-run) lure. 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 7

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://trafffe.ru/123?utm_term=windows+server+client+access+license PDF link annotation
    • https://fatuzolawodazu.weebly.com/uploads/1/3/4/7/134730183/1726761.pdfIn PDF document text
    • https://vuxojamobepu.weebly.com/uploads/1/3/4/3/134333522/zukulet.pdfIn PDF document text
    • https://kurikezexiwu.weebly.com/uploads/1/3/0/7/130775092/3bb0652604a457.pdfIn PDF document text
    • https://wilitixovin.weebly.com/uploads/1/3/4/3/134351513/f8924c6a.pdfIn PDF document text
    • https://gekitudijelal.weebly.com/uploads/1/3/4/2/134265938/mineko_munowe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421944/normal_5f969053c596a.pdfIn PDF document text
    • https://pazolumaf.weebly.com/uploads/1/3/4/3/134356568/f92a146a803f45.pdfIn PDF document text
    • https://fozaxebefi.weebly.com/uploads/1/3/4/5/134584315/rirog-zovuluduzosapo.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/b6338bb3-051a-4624-abf9-64f0f4a42b71/80640914551.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1de6ec93-b54d-4b2d-993e-8f040908e1d3/lyrics_and_chords_for_behind_blue_eyes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b67d0aad-244e-4766-97fa-85522add365f/jimi_hendrix_electric_ladyland_zip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f9ca9c5-c2a4-43f7-8b17-b3cc0f3ff953/marlin_guide_gun_sights.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b275eea9-72cd-49f6-a7dd-bb1d3f576ad3/total_conquest_offline_mod_apk_latest.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13e020ae-89de-418e-a8c6-c0140ac4109b/74925014929.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_off0000cc2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC2A 5100 bytes
SHA-256: 4fa52cd026a3f80eaf706d4c16f56dbf9acb701bd0832625057812cd9c6e1a0b
font_01_sfnt_off0000ddad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAD 10520 bytes
SHA-256: 576f66835e0eb174f1812e9f8b6ec6cb58e18a0b5e89a1d7523922e8545ee761

Open this report in the interactive analyzer, or submit your own file for analysis.