Malicious PDF — malware analysis report

Static analysis result for SHA-256 5436fac5836070cb…

MALICIOUS

PDF

68.8 KB Created: 2021-02-21 11:45:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 31aa61c1c760f8cb2980904c26f59372 SHA-1: aa9eb71cadf0d32bd9ecaf0a9950d2d31d914db2 SHA-256: 5436fac5836070cbc98c47a93cbf74b68261dd631605c0b09cfaccee05b68c93
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://druttle.ru/aws?utm_term=vector+calculus+susan+jane+colley+4th+edition+pdf PDF link annotation
    • http://talkme-news.info/12191051232383r5.pdfIn PDF document text
    • https://rixemovupel.weebly.com/uploads/1/3/1/6/131606965/ruxolig-narakudizaxak-negaku-nujowaw.pdfIn PDF document text
    • https://zodazapel.weebly.com/uploads/1/3/4/5/134511258/f18b0527.pdfIn PDF document text
    • https://bajipupetezin.weebly.com/uploads/1/3/5/3/135315063/fobubav-jipifod-povazawis.pdfIn PDF document text
    • https://kozinawesi.weebly.com/uploads/1/3/3/9/133997283/4031531.pdfIn PDF document text
    • https://bivesezuwewosup.weebly.com/uploads/1/3/4/7/134765681/4e7c7eb8.pdfIn PDF document text
    • https://pisiteju.weebly.com/uploads/1/3/5/3/135314571/2163235.pdfIn PDF document text
    • http://itawegan.space/kawuwipolixemuzumede75l6o.pdfIn PDF document text
    • https://gotenalonas.weebly.com/uploads/1/3/4/3/134372716/ef2cf99c3b7.pdfIn PDF document text
    • https://cdn.sqhk.co/bolukawet/DqggeZd/fovoxikezabufa.pdfIn PDF document text
    • http://tcerkovniekupola.space/penny_coin_value_guide3wa0v.pdfIn PDF document text
    • https://cdn.sqhk.co/wogefosa/dXgFigj/play_store_free_video_calls_and_chat.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/mexijegedakol/23190362669.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/manual_barrier_gate_arm.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/37607411914.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/messenger_lite_app_9apps.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/cellebrite_touch_update.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/office_manager_cv_template_uk.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_off0000ccd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD7 5476 bytes
SHA-256: 7f2042d8767a1ff84a96d38b6584541aff615d10e0c7e4aae38264aeb504b5dc
font_01_sfnt_off0000df82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF82 11436 bytes
SHA-256: b5095863070d04797eb1e14ab6ef3943a8aa3e197788e7ff8735d9a98b83f489