Malicious PDF — malware analysis report

Static analysis result for SHA-256 4174e69196f2a52c…

MALICIOUS

PDF

38.7 KB Created: 2020-11-08 23:10:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: feddc6146101ae10ede955c08ebab174 SHA-1: de136cf2175277d98b86666f366d59d1077d259c SHA-256: 4174e69196f2a52cfab1195509243beafb587fac20831d0972376a9d078639f3
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/aws?keyword=epson+3650+manual In PDF document text
    • https://ranenowubugipo.weebly.com/uploads/1/3/4/0/134040983/3775c85ecd.pdfIn PDF document text
    • https://dodawuwaxa.weebly.com/uploads/1/3/4/3/134305805/11eb24ba86b.pdfIn PDF document text
    • https://kotonimurapuva.weebly.com/uploads/1/3/4/4/134440920/4279076.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365600/normal_5f8716ebcdd90.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/1a27643b41869.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405181/normal_5f9e3a2fe7211.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/felasorarabipis/10798382670.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ddfd685-01dd-485f-9d5e-e517a0a81a79/5th_grade_ecosystem_webquest.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/040e4fde-3afc-4b3d-8107-1dfe987436e7/toxakoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6945a95b-4449-4555-b92a-8dc43e5fa3cb/adresse_resiliation_bpce_assurances_caisse_depargne.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/033513da-e4b9-4cbe-9370-30acd36f3454/dhoom_3_movie_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/letuzatolobivididuloj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f76d8180-39cd-4648-9dc3-cc20fc724d52/pedajiruvukidizoxox.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/82778989693.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_off000058cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58CC 5408 bytes
SHA-256: c68af5b918ed194e20b05702c0db0ea680b0f7fbe77a37d4fc623349b05b97a0
font_01_sfnt_off00006b21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B21 10456 bytes
SHA-256: e744788ae7ca1195d4e447f5ce529d144ffabec7c07d9638791e1b60cf48beff

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