Malicious PDF — malware analysis report

Static analysis result for SHA-256 4429024cb9ef1422…

MALICIOUS

PDF

67.8 KB Created: 2021-02-06 15:28:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: b6ee2c773cb08a958b0398cf94174281 SHA-1: e781a159de0de469fbb70ba9bb9fedf9ad8ccafd SHA-256: 4429024cb9ef1422685c97806938cde727eddb14f5bc2a267fe25609dae3a2e8
254 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
  • 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://crophysi.ru/aws?utm_term=honeywell+1250g+datasheet In PDF document text
    • https://cdn.sqhk.co/virurewev/ficiiA4/dogfight_musical_soundtrack.pdfIn PDF document text
    • https://cdn.sqhk.co/vemetafije/ibmgdOW/at_t_tv_customer_reviews.pdfIn PDF document text
    • https://gafukarufigak.weebly.com/uploads/1/3/5/3/135309608/fasuxekif.pdfIn PDF document text
    • https://cdn.sqhk.co/wujodazera/jbjdmhj/sunewuw.pdfIn PDF document text
    • https://jaxemojemilela.weebly.com/uploads/1/3/4/6/134622921/goxejexoza-zivez-weduzumulofaxuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487192/normal_60130d84a7ea3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448549/normal_60126ab64b2b8.pdfIn PDF document text
    • https://jusopusoguwukul.weebly.com/uploads/1/3/4/4/134494455/vodepexexa-fefal.pdfIn PDF document text
    • https://balimalovi.weebly.com/uploads/1/3/2/7/132710770/fujade.pdfIn PDF document text
    • https://cdn.sqhk.co/wafexumu/9hhhgyY/superhero_avatar_creator_app.pdfIn PDF document text
    • https://cdn.sqhk.co/malofavu/HlHjfWj/belaguzafonoluwarogazu.pdfIn PDF document text
    • https://cdn.sqhk.co/benibavagoge/eTiipgd/66772646209.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478685/normal_6008dff59d0a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489734/normal_5fdffcc54fda0.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/ahgjhhe/sowogizif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c6f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F7 5596 bytes
SHA-256: 63eb584ea6a4836e8487aa89efbb2c3fc36672957e0e849a844527826f6645c4
font_01_sfnt_off0000da19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA19 11940 bytes
SHA-256: de327be7b51f7f0ce8ad58fa9b93afb5ff8f8f797220365423e9765aeeaf22d2