Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e8f9c201f4d5870…

MALICIOUS

PDF

75.3 KB Created: 2021-01-05 16:30:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 48566e64d2348e9ea49499bb8acea0c5 SHA-1: 171d29dfe630804695b75a18dc27fad13aeef92d SHA-256: 1e8f9c201f4d58708d154faa25ff35ec63af36dcb23c8f13feb3df30090b1323
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffset.ru/aws?utm_term=brussels+midi+station+platform+map PDF link annotation
    • https://cdn.sqhk.co/lanumakefu/Rpahi5k/korobujisamokilotigono.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/gK8Jiic/foxutilemosiwedemamuwux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486359/normal_5fec447910633.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378390/normal_5fc1700440bc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471946/normal_5fa63987adcba.pdfIn PDF document text
    • https://sudororurupe.weebly.com/uploads/1/3/4/6/134602833/5342004.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408483/normal_5fb2fbb64e16b.pdfIn PDF document text
    • https://gifidutuv.weebly.com/uploads/1/3/4/6/134666467/fidodunolo_zivimeraza_jixezefasar_neroxebekewepod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369645/normal_5fde0c13750e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379601/normal_5f8b9ee6bd237.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/00fede54-ebcd-4f57-b0cb-fe4306c4f31b/meryem_ana_otu_hikayesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5ba87bc-a4e3-4c3c-b1f7-f1cdfc1a2d22/puxaxiwip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e5127ea-6fb0-4a7a-987e-cb7373df6804/miel_de_agave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9af8fe08-fcd9-4d77-a531-2758798cf354/27077997522.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8b08a4f-2748-44d8-9cba-31130d548f34/80124400481.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_off0000e941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE941 5236 bytes
SHA-256: ee1dfcc75bf8d4ac6dcb9cfdf5377ec4e6a8ef245e0b10f6a4bb4594b929b240
font_01_sfnt_off0000faf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF4 11240 bytes
SHA-256: 5de684c46b4b62dff4d2da5a5e0bc5b3a55c4ed501da251f553ef28cafffdaf9

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