Malicious PDF — malware analysis report

Static analysis result for SHA-256 10441f10db98b3ed…

MALICIOUS

PDF

66.2 KB Created: 2021-02-16 02:41:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: bf0f56c6550d25ffc8f7c306a8f6c9cb SHA-1: b3d58552ada5b40656abc34ad216b065df483ab7 SHA-256: 10441f10db98b3ed092a7c37f680bb599ef2561642614716782376e80521cd08
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a link farm designed to obscure malicious destinations. The ML classifier and ClamAV detection confirm the malicious nature of the file, likely serving as a lure to download further payloads or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://maypoin.ru/wix?keyword=wagan+tech+power+dome+nx2+manual PDF link annotation
    • https://taxudomajifi.weebly.com/uploads/1/3/4/1/134108655/f1fbaacb.pdfIn PDF document text
    • http://vorgazme.com/drug_and_alcohol_policy_template_victoriazb2wq.pdfIn PDF document text
    • http://topsalon.xyz/avery_8160_template_for_mac_pages1hba0.pdfIn PDF document text
    • https://xuropowupenuba.weebly.com/uploads/1/3/0/8/130813979/funalivafiwuluk.pdfIn PDF document text
    • http://biomaniks.website/givozesobojufejig2vl2j.pdfIn PDF document text
    • http://br1.red/wormax._io_videos_de_mouhahad65r8.pdfIn PDF document text
    • https://zajebujop.weebly.com/uploads/1/3/4/9/134902249/7aeae.pdfIn PDF document text
    • http://srakan.space/nfl_sports_scores_for_todayvpduf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408478/normal_5fe7a62ae5aa1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479446/normal_601c9cbb9c2d8.pdfIn PDF document text
    • http://tactical-jacket-sale.shop/wilexperi4.pdfIn PDF document text
    • https://xabomitutopimo.weebly.com/uploads/1/3/5/9/135961599/1442153.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477162/normal_600f6576855d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461763/normal_5ffbdaa46d57e.pdfIn PDF document text
    • https://tojewenegekov.weebly.com/uploads/1/3/4/5/134502344/bivuniwokijesawipo.pdfIn PDF document text
    • http://trells.space/304401058215dz96.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/waduzirader/herpes_labialis_nice_guidelines.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_off0000c5ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5AC 5616 bytes
SHA-256: a4faf36feead47b425028a1f4b06f8b1c15fe3d2dea5bfddefb53683e8da156b
font_01_sfnt_off0000d8b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B9 10208 bytes
SHA-256: 7c1c311891897a02671adb8c09a59aec17a85bde9afc2b0281aa0bcc424cf48d

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