Malicious PDF — malware analysis report

Static analysis result for SHA-256 033f272f8160f97a…

MALICIOUS

PDF

69.9 KB Created: 2021-02-23 04:58:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 49fa093e2923f27a6e147c6037ac665c SHA-1: 204108955fcd4af386006eb4bf869b57347805c2 SHA-256: 033f272f8160f97a348a1baa3f24949be14682c6e9364c187ab63d04fcf3f508
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://jottigo.ru/wix?keyword=anatomy+of+a+generalized+cell+worksheet+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377925/normal_601a4d365e68e.pdfIn PDF document text
    • https://cdn.sqhk.co/xedogigiloli/hjhhsjf/chase_mobile_app_not_working_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/rimudatige/0Ejejeg/dafobekinisesumat.pdfIn PDF document text
    • https://cdn.sqhk.co/jarebomu/F3jhshh/12573439490.pdfIn PDF document text
    • https://cdn.sqhk.co/bisuligiga/en7giRt/25226633978.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461763/normal_6009003484fd1.pdfIn PDF document text
    • https://cdn.sqhk.co/xekutenupi/hhjnoFf/22052917493.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450747/normal_5ffb28b9edd9c.pdfIn PDF document text
    • https://cdn.sqhk.co/lisupixiwe/h1jiRgf/wedabaxatukoluxa.pdfIn PDF document text
    • https://gunagabivap.weebly.com/uploads/1/3/4/8/134863042/6880706.pdfIn PDF document text
    • https://cdn.sqhk.co/lokiwejawe/6Suifpu/i_don_t_know_song_telugu_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/jinubodilev/jfLUUgc/fishdom_game_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494138/normal_6014c159d12de.pdfIn PDF document text
    • https://jafedemigizol.weebly.com/uploads/1/3/4/5/134588438/6243498.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391903/normal_601a2d3a1b839.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_off0000d535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD535 5732 bytes
SHA-256: 972c6b4c3544e67d6ba776fe52597e7082911a22322df2d34c21c286cb9b19f2
font_01_sfnt_off0000e8bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BB 9972 bytes
SHA-256: 5414bf7a0a92e77ab3a6c55618a378111161a2f8f9e32c59fc07192165bbcd1f