Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c214af4e346c6b7…

MALICIOUS

PDF

71.3 KB Created: 2020-11-21 00:21:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 7641d6c080fed325d176a02bcdaddc18 SHA-1: 71801fc43c4ca62d2c317307d341a9c9d6b403ad SHA-256: 0c214af4e346c6b7946c07123da5ec2b5a57f98a5ad681885861d2ecfe89ce6f
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF document is classified as malicious by ML models and ClamAV, indicating a phishing and trojan threat. It employs social engineering tactics by presenting a fake download button and a lure for a 'filemaker 14 webdirect guide'. The document contains a link farm with multiple external URLs, many hosted on disposable domains, suggesting an attempt to redirect users to malicious content or further stages of an attack. The presence of embedded URLs and the 'SE_BROWSER_INSTALL_LURE' heuristic further support the phishing and malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/aws?utm_term=filemaker+14+webdirect+guide PDF link annotation
    • https://rajomiluti.weebly.com/uploads/1/3/2/6/132682989/tojobuzatad_pibizofij_sarujizo.pdfIn PDF document text
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/0c7ca22423.pdfIn PDF document text
    • https://towetebofipu.weebly.com/uploads/1/3/1/4/131437669/020e3b727db.pdfIn PDF document text
    • https://vumerumub.weebly.com/uploads/1/3/4/6/134634189/gememetinogesud-fofowiguviwuw-musujabok-mizarafobetewa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381318/normal_5f9e348856864.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387919/normal_5f9e51c7a7bf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381529/normal_5f8ee777c757f.pdfIn PDF document text
    • https://xadiditenir.weebly.com/uploads/1/3/4/7/134763486/nokalopebisazepuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383917/normal_5f966bd76f5e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481515/normal_5fb805fe0f994.pdfIn PDF document text
    • https://zoforute.weebly.com/uploads/1/3/4/3/134352948/7927824.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/poguvelefa/42784768919.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/toronto_alexithymia_scale.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_off0000d4b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B8 5472 bytes
SHA-256: f03b49def4ac4193d04dbfca0439176543f7f9ba5bdd9e351a93f6ce7f9f9508
font_01_sfnt_off0000e75d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75D 12792 bytes
SHA-256: 84a12366010451492d485b540a037a8c0e008741a463698426f7a104523bb2e6

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