Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b903afe9027428d…

MALICIOUS

PDF

254.8 KB Created: 2021-05-16 07:41:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 41e2672aa87ea0c08875081058d523aa SHA-1: 97d49f975d87ee2c9bdc26ac0521ba9a55db7056 SHA-256: 2b903afe9027428d3bf2337025a8767db315a5c1ab68518111582fb5d73ec1f6
144 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, with high-confidence heuristics indicating it's a PDF phishing lure. The embedded URL `https://maypoin.ru/strik?utm_term=brother+ls+1217+extension+table` is used in a redirector, suggesting an attempt to trick users into visiting a malicious site. No scripts were extracted, but the overall pattern points to a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9789

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://maypoin.ru/strik?utm_term=brother+ls+1217+extension+table PDF link annotation
    • http://daddytestit.xyz/la_foule_edith_piaf_piano_sheet_musict9goe.pdfIn PDF document text
    • https://seritixatot.weebly.com/uploads/1/3/1/0/131070849/xexotegariwaxajo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387590/normal_600af2054dcce.pdfIn PDF document text
    • https://cdn.sqhk.co/ravawiku/idmifha/bubble_shooter_3_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xugiwatokax/Epbiihe/1835527973.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449422/normal_601dd0464a9f3.pdfIn PDF document text
    • https://nejaxadutoxukax.weebly.com/uploads/1/3/4/6/134622523/jesajewaxobod.pdfIn PDF document text
    • https://kuwewukes.weebly.com/uploads/1/3/1/6/131636575/rubofekobaw.pdfIn PDF document text
    • https://jetezilim.weebly.com/uploads/1/3/0/7/130775858/1083513.pdfIn PDF document text
    • http://geekcods.com/kawasaki_concours_zg1000_service_manual8ivei.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwipabobatu/hjTbjiQ/74237560628.pdfIn PDF document text
    • https://cdn.sqhk.co/gizoxemovefi/jfTsvgf/pen_pineapple_apple_pen_meme_generator.pdfIn PDF document text
    • http://axecheat8.xyz/lincoln_johnson_and_radical_republican_plans_for_reconstructione7n6c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415950/normal_60019b2d57181.pdfIn PDF document text
    • https://cdn.sqhk.co/xiteduva/fgc5Olx/vepujazedovabejapofan.pdfIn PDF document text
    • http://shtangelkipokupkiitd.online/liparixajutofadamarsxotq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491168/normal_603bd279304f2.pdfIn PDF document text
    • http://wuwisometojone.66ghz.com/bootable_windows_7_dvd.pdfIn PDF document text
    • http://hotel-engels.ru/34634623886i5k8v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1527c8d3-3321-4e9f-872f-e2bebb57bac2.filesusr.com/ugd/bf2d42_3d478a4cd4dc476eb2e4dbd57923df4e.pdf?index=trueIn PDF document text
    • https://27f1a270-5048-4778-87f0-574dfe85248a.filesusr.com/ugd/b7306e_81d1310d7b5a445c926d6f1ac4b04543.pdf?index=trueIn PDF document text
    • https://995be609-08d3-41b1-a6c0-90e53670bcec.filesusr.com/ugd/9988e1_4dee5ef856db429aa65fe01e134e124e.pdf?index=trueIn PDF document text
    • http://novegiw.rf.gd/resumo_historia_do_brasil_para_concursos.pdfIn PDF document text
    • https://d6d3a1c5-32ce-46e9-ae92-c5b8d84d65d9.filesusr.com/ugd/a3b54b_3cbf09b547fe4de5afcf1f598e0d64db.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000399e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x399E3 5296 bytes
SHA-256: cbe8f56fa17d258b11c484a2b19778d7090365424addf55bc78af34aff1a3961
font_01_sfnt_off0003abe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3ABE9 12696 bytes
SHA-256: 878e64887fc87bec0a3fecd0bb60280ca0c8ed7189167853f4746589a194463a
font_02_sfnt_off0003d66f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3D66F 16232 bytes
SHA-256: 561f812873edee893358484a1d0b15725aafdee0cf7f20b6ea7f7f5924cce937