Malicious PDF — malware analysis report

Static analysis result for SHA-256 865e1c63502f4cfa…

MALICIOUS

PDF

74.5 KB Created: 2021-02-28 06:37:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 9d3bc3dfe02ab6c322e185f3a208a1f2 SHA-1: 48bd34b9cea99eae7da6b964a14d9a83e11a11bb SHA-256: 865e1c63502f4cfa948ce44e777c409f27af6bc97b37185d3f308636eeb5db9b
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, including one that redirects to a disposable hosting domain, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, appears to contain keywords related to search queries, likely intended to trick users into clicking on the malicious links.

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://soxebez.ru/aws?utm_term=ezgo+golf+cart+wiring+diagram+batteries PDF link annotation
    • http://themarkuzmusic.com/divoranamulupebuxh4dov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450244/normal_601ff529e68bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426262/normal_5fc7cf86d6e33.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377704/normal_6005e4b2aa494.pdfIn PDF document text
    • http://rafupofamurawaf.mygamesonline.org/83938083241.pdfIn PDF document text
    • http://vinnipoh.space/selenium_reporting_tools_ce75hc.pdfIn PDF document text
    • http://nepoxiduvilej.scienceontheweb.net/the_vampire_diaries_quiz_season_1.pdfIn PDF document text
    • http://gojavodevagajuw.mygamesonline.org/pogimenisurinefofojid.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/rope_knots_for_mountain_climbing.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428334/normal_5fe4e586e91e1.pdfIn PDF document text
    • http://kudopifupelixi.22web.org/62260973714.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
    • http://givonomiruf.rf.gd/agriculture_information_technology_centre.pdfIn PDF document text
    • http://vulemeke.rf.gd/tagidevejapebeligorodu.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/77140288691.pdfIn PDF document text
    • http://ramasewo.epizy.com/guxoxexepi.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/fazujeviriwadovuxig.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_off0000d9d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D6 5368 bytes
SHA-256: 2371b407b81e710cc528bb47cab2f1791a29ebe34c905de480009a4afacf9b6d
font_01_sfnt_off0000ec17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC17 10208 bytes
SHA-256: 620bf6cc8da49af7995abeac259e0dd457fe469b80ac62736d7acbb24f0cd74e
font_02_sfnt_off00010efb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFB 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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