Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fd049c0dc65f14b…

MALICIOUS

PDF

63.6 KB Created: 2021-01-27 23:21:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: e8424b538ea726333e550feebd8b5b1b SHA-1: da94cc771e93852081c9f58faea8a53cd6c4d384 SHA-256: 3fd049c0dc65f14b6da5fc1843c04a30abf961617c933de50b53089819edb1c3
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://jacksth.ru/aws?utm_term=gana+balachander+audio+song PDF link annotation
    • http://wgathering.org/fishing_rod_clipart_png2rf7a.pdfIn PDF document text
    • http://skywonder.space/vugewka6q7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450625/normal_5ff2bdf07c0f9.pdfIn PDF document text
    • https://baseparefawufif.weebly.com/uploads/1/3/1/4/131453046/149417.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451927/normal_5fdabff290414.pdfIn PDF document text
    • https://jebopisozezir.weebly.com/uploads/1/3/0/7/130739828/6698194.pdfIn PDF document text
    • https://nubipudovolena.weebly.com/uploads/1/3/4/0/134012318/9037582.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/degagaziv/48629182623.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/deloitte_advisory_services.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/30411369640.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/30969731151.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/angle_meter_apps.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/siklus_hidup_ancylostoma_duodenale.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/gold_guidelines_acute_exacerbation_copd.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/erasmus_2020_programme_guide.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_off0000bb57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB57 5372 bytes
SHA-256: c49d0d6660881ad45c6dd5a0e2061c5a6ec88d4e3cd123f5df9bd1c372dacb39
font_01_sfnt_off0000cd8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD8D 10644 bytes
SHA-256: 4fac5ddacd596b444ef36927084a59db9fb7faa6dd563f5318f7d7343521e2c1