Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2777025bbd5947f…

MALICIOUS

PDF

71.3 KB Created: 2021-02-28 16:55:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 54764ef996656d331cd08ea7c9f17245 SHA-1: 101d1ca86269a694d5854b36bcb98a8ee8e1d722 SHA-256: b2777025bbd5947fc072dedbb5b255f943900153de504929fb66695b29d8502b
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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://zajinet.ru/award?keyword=oster+ckstbrtw20+parts PDF link annotation
    • https://fimedezederuru.weebly.com/uploads/1/3/4/8/134884956/pegumenadagusuxapo.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/bgijfjb/lelamulitof.pdfIn PDF document text
    • https://lugukeku.weebly.com/uploads/1/3/1/4/131407734/gokijapub.pdfIn PDF document text
    • https://xavimunemu.weebly.com/uploads/1/3/2/8/132815343/pitujofuxidanazem.pdfIn PDF document text
    • http://compte-cmbretagne.best/jailbreak_4._2._1_without_computermlq48.pdfIn PDF document text
    • https://zevenilusowaj.weebly.com/uploads/1/3/4/3/134324486/7642914.pdfIn PDF document text
    • https://musevupuli.weebly.com/uploads/1/3/1/4/131438528/tediluwulidigi.pdfIn PDF document text
    • https://lusimijibujadex.weebly.com/uploads/1/3/4/6/134677052/rewugibowalajulatab.pdfIn PDF document text
    • https://vawanateriti.weebly.com/uploads/1/3/0/9/130969814/mitukabokiw.pdfIn PDF document text
    • http://item-get.top/zipatilesogixavy36w5.pdfIn PDF document text
    • http://usesoda.pro/combined_gas_law_practice_sheet_answersor3jz.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/befarekogol/41735059281.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/how_to_tie_the_best_knot_for_fishing.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/particle_brush_photoshop_cs5.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/porsche_cayman_s_2006_performance.pdfIn PDF document text
    • http://ligoroxenafof.atwebpages.com/primeros_auxilios_cursos_gratuitos.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_off0000d92e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD92E 5492 bytes
SHA-256: 803e17f85b91f7580e6f72f5987cac3f4197b1a664d631712cb7c7040b6eaf2a
font_01_sfnt_off0000ebfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFD 10560 bytes
SHA-256: e68b4aae374baabf459882dd0c5bd7e7f71d0d2cd35140494423e93e5f4a8583

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