Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff14bf75c44f4cfb…

MALICIOUS

PDF

85.7 KB Created: 2021-03-21 12:03:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 658e5e93a13d6d0b3e3aec073ed3ba71 SHA-1: 89b5709038f6dbd29bcc42825032c4e1745b5fd8 SHA-256: ff14bf75c44f4cfb91f361887d4944767cee3cff7a621eee2decb4b07c87011c
194 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan distribution attempt. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm used for SEO manipulation or redirecting users to malicious content. The document body, though heavily obfuscated, contains keywords related to patterns and links, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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://vilenefex.ru/award?keyword=cross+back+apron+pattern+pdf PDF link annotation
    • https://wetolobumusu.weebly.com/uploads/1/3/4/5/134579125/vinavedaku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366982/normal_604a56007359f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452850/normal_604cf3c93e0c2.pdfIn PDF document text
    • https://japiravonasuv.weebly.com/uploads/1/3/4/6/134644749/nedefiledor-konel-refurafetunewut-nonebedan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379230/normal_60445e94cf70b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388279/normal_600801d9edc3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447079/normal_604956ed16ca4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385230/normal_600c197b53be7.pdfIn PDF document text
    • https://topejaliwas.weebly.com/uploads/1/3/4/3/134305960/3774004.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459036/normal_5fc663a60574d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485576/normal_60244a33ec2dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467003/normal_6037e7606d7a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501361/normal_60447507ad8b2.pdfIn PDF document text
    • https://gedofulijul.weebly.com/uploads/1/3/0/7/130775434/likaradoroguda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447487/normal_605715a656e33.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d80868e2-5d34-4dda-9345-0396294a35aa.filesusr.com/ugd/f9fac6_7266861374c547f3945fd65a2c76fefa.pdf?index=trueIn PDF document text
    • https://fdb4f28e-c637-431f-967d-457feef73efb.filesusr.com/ugd/cf5aa9_1a543ae6c61b4735b3b677364b188450.pdf?index=trueIn PDF document text
    • https://2e81f42f-67f9-46a9-89e2-a5f3ab3b03ee.filesusr.com/ugd/f138f5_99fe857fdccc4c46ae094bf8fa24afb4.pdf?index=trueIn PDF document text
    • https://692937ca-140d-46b9-9715-018e108c1018.filesusr.com/ugd/2540a5_8f16820a5bf34ca8b0c313a946be1870.pdf?index=trueIn 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_off0000f618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF618 4564 bytes
SHA-256: 8b875867e0f4a61714719daac7f53b69db036d0e44a75206a725f4bffcd5b477
font_01_sfnt_off0001063c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063C 5228 bytes
SHA-256: 9bcbd2ee2bf67d0a0beecf83e0b43285c2ef32b26aa5f9c707786b078d026d49
font_02_sfnt_off00011808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11808 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_03_sfnt_off00012096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12096 11356 bytes
SHA-256: 93b48a6daa54f61594b91583166108be0b3d6bd65d37c945628ba00f09c99b79

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