Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c8d57b467ac7303…

MALICIOUS

PDF

73.6 KB Created: 2021-03-14 08:02:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9164bc33d7097162d73f3843dc273c94 SHA-1: cb9dcab3cee8307c9ff6e32abcb9499b04c8f7cc SHA-256: 5c8d57b467ac7303563be6eb43b79532f6ed68b71b2ea442d38fd9ca0a0b8d3e
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to disposable hosting services, suggesting a link farm designed for SEO manipulation or phishing. The embedded URL and the heuristic firings indicate an attempt to direct users to download content, potentially malicious, under the guise of game downloads. While no scripts were directly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/wix?keyword=plants+vs+zombies+unblocked+download PDF link annotation
    • https://punofusa.weebly.com/uploads/1/3/2/6/132695323/9163222.pdfIn PDF document text
    • https://tisolalaw.weebly.com/uploads/1/3/0/8/130814234/f5c9b83121a8.pdfIn PDF document text
    • http://pshcomonhere.xyz/favokiwenefedusekygv.pdfIn PDF document text
    • http://lnstagramverifiedsbadgesforms.com/shark_night_3d_movie_castseg60.pdfIn PDF document text
    • https://saxarewuvopa.weebly.com/uploads/1/3/4/8/134855039/belizevakoj-fekes.pdfIn PDF document text
    • https://fiwofufoneronup.weebly.com/uploads/1/3/1/0/131071066/2951896.pdfIn PDF document text
    • http://zomoxoxuriw.mypressonline.com/wasaxizakubug.pdfIn PDF document text
    • http://kevifiregerufug.scienceontheweb.net/theoretical_framework_and_conceptual_framework_in_research.pdfIn PDF document text
    • http://jesofoma.getenjoyment.net/how_pathogenic_viruses_think.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_3ba9fd861d4e448b9dc9a901b1461e2c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sefipa/examiner_report_ntu.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/vixalawetilewimefijutoj.pdfIn PDF document text
    • https://61df3396-90b5-4b69-a3ae-475c9da6ebc5.filesusr.com/ugd/516574_82977fd227894618bf41711f133c7a62.pdf?index=trueIn PDF document text
    • https://78fa80b2-8629-447b-ad63-53e91e8d4948.filesusr.com/ugd/8f02de_9e96ccb46a3441cbbc4b098b1eb6d1aa.pdf?index=trueIn PDF document text
    • https://88e92b2d-3ddf-41b2-a2ae-4af48bfba274.filesusr.com/ugd/b74686_bf107f4aabf047d993f70c0f0019aa18.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bufexa/yangon_street_food_guide.pdfIn PDF document text
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_1a9e73a817764d9fbc8a92efd6fa8f54.pdf?index=trueIn PDF document text
    • https://43a2ba88-5de9-465b-b95f-6a4d82f2d06e.filesusr.com/ugd/dcbeda_c3d7c4fdf7d14b608382d5c4554835b2.pdf?index=trueIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_edf8347b4e5d4e738672a8d71d700bea.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/senopoxugozuwupefor.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_off0000e317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE317 5396 bytes
SHA-256: 9e0fca91e3a3e969609f886721ac20447f084e0521105fc3df4287d768f2f696
font_01_sfnt_off0000f581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF581 10316 bytes
SHA-256: 5c5c5f5d6dbff5cb971fe517cdf1303c5a28eb481f067ac4e99be1f008447b9c