Malicious PDF — malware analysis report

Static analysis result for SHA-256 60df3e60f23a23cb…

MALICIOUS

PDF

71.1 KB Created: 2021-03-20 18:08:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7efec27fba67713ebab62268f25f973d SHA-1: f3c7e230698896ddb6a74afc1ef141b9f4587a73 SHA-256: 60df3e60f23a23cb22e2981faa031b839d993912168bb2b112358c89183dff64
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, indicated by the 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to direct users to malicious websites. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the presence of external URIs and the overall structure point towards a phishing or content-farming attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://zajinet.ru/wix?keyword=stack+on+tool+box+side+cabinet PDF link annotation
    • https://dinofewujib.weebly.com/uploads/1/3/1/3/131379591/gexovo-tepis-lirudapefo.pdfIn PDF document text
    • http://tuvexiwegivuke.iblogger.org/nedepuvakometaluwes.pdfIn PDF document text
    • http://wawovotem.22web.org/how_to_fix_blade_in_jigsaw.pdfIn PDF document text
    • http://zesepajokab.22web.org/jiwenurofamumixemomusa.pdfIn PDF document text
    • https://xemavuvewo.weebly.com/uploads/1/3/5/3/135394060/c34dfb2a285.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/woxorojero/bodisetuvorafagefirobe.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/baldur_gate_dark_alliance_ps3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf4264bd-0830-469a-a0ea-e1d5ace540d5/boy_in_striped_pajamas_book_vs_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/temab.pdfIn PDF document text
    • http://gofosuxubajo.epizy.com/22068972936.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/37754444327.pdfIn PDF document text
    • http://nilexidudi.epizy.com/90474822431.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/273da84c-1f53-4f15-96bf-403c94aad9e6/whirlpool_washing_machine_not_spinning_and_making_loud_noise.pdfIn PDF document text
    • http://gelotamarabi.epizy.com/football_classes_for_5_year_olds_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/76934601633.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/formal_dresses_online_shopping_usa.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/resowiluvezo.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/68108110168.pdfIn PDF document text
    • http://wufofot.rf.gd/83561958474.pdfIn PDF document text
    • http://bajofot.epizy.com/know_how_agreement_template.pdfIn PDF document text
    • http://lobidirubegevil.epizy.com/samsung_galaxy_note_3_battery_problem.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_off0000d7d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D0 5212 bytes
SHA-256: 8fa1cbaa60f1d859abb581a67f009145129361626b3c8c35c0eda2b4828403f4
font_01_sfnt_off0000e99c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99C 11072 bytes
SHA-256: 29abbada0ab440f1f4964dbbc6c493be794bfea2720e5c59daf25284235025fc

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