Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c8a0dec8a96b011…

MALICIOUS

PDF

72.3 KB Created: 2021-03-05 02:40:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c6509f933667aa1facb15ddcb38e721c SHA-1: 886bbafd7070ea77e8b0489e6e878f8c788d3f56 SHA-256: 5c8a0dec8a96b0118cd1666edc27657db9dd24efdb8b3f9710996b986f4a5891
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable domains or link farms, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure disguised as a product manual.

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://fokemale.ru/wix?keyword=light+up+skull+shift+knob+manual PDF link annotation
    • https://cdn.sqhk.co/gumojitoxowu/YgdHBbd/fishdom_app_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/pemenixa/i33Kgap/98621219743.pdfIn PDF document text
    • https://cdn.sqhk.co/wikepijosipi/Sjf8RJm/21160758706.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/bnE5K8X/subway_vinaigrette_vs_oil_and_vinegar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410020/normal_5fc68b7c216e5.pdfIn PDF document text
    • https://cdn.sqhk.co/zitibidino/h6hhqSh/rosesedinugopomatu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377924/normal_601ef3f6bbe75.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://4a5660cc-52a2-48ff-9acb-4b4f1704cb6e.filesusr.com/ugd/81868d_6593cc94040242d3b3635a9f3e32f995.pdf?index=trueIn PDF document text
    • https://8c17aa34-c454-4d6c-a218-8929c845e329.filesusr.com/ugd/808cd0_194c0faeeabf46f5ad288ea89a535109.pdf?index=trueIn PDF document text
    • https://bf23b77b-49a9-4bef-a898-a03cfb94aefa.filesusr.com/ugd/134172_4177a1f4de6f43c59ddbd97d5011ab9c.pdf?index=trueIn PDF document text
    • https://89e5ed4a-33eb-42a6-b5f1-9fc07ea1e15b.filesusr.com/ugd/ff68bb_1c6fdf8098b245ad87d2857dca639e65.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/4700994646.pdfIn PDF document text
    • https://bb55feb6-a0c4-48ae-8f72-aea2c45912f8.filesusr.com/ugd/b9801a_92422afdfd2f4f898a8c6fa11d4693ce.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/65716402303.pdfIn PDF document text
    • https://76df98a8-3e94-4eee-a6f5-23e1de06049b.filesusr.com/ugd/54c74c_0b056047fb30492a9848960d54f51903.pdf?index=trueIn PDF document text
    • https://ec5c17a1-061e-4a2c-a9e6-b3561ba71229.filesusr.com/ugd/299074_cf1edc08bb0143dc90ec396df1ee1496.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lebejos/armory_bitcoin_wallet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d07f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD07F 5128 bytes
SHA-256: d13f8ddf2f61890d5609a714872bc466edb623e0c836c3c1c69306e2a2755f1b
font_01_sfnt_off0000e1cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CC 10692 bytes
SHA-256: 0a46d7ac005d06749a258bbd98955c407c7767f43bf5fe28f40a9c5137bba3eb
font_02_sfnt_off0001062c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062C 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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