Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cf562d02f206b61…

MALICIOUS

PDF

84.5 KB Created: 2021-04-08 21:22:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ab95ff45668aadf9b39849fa189efe91 SHA-1: 71f5dd8b0da5a51f5cd6a7a75d5e11ac120abf38 SHA-256: 9cf562d02f206b6117d3d9c62e74bd3fbf83443099dcd241912dfa8288c22b54
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The file is a PDF detected as a phishing trojan by ClamAV and an ML classifier. It contains an external URI and a redirector link that point to a URL associated with a 'free-download phishing' lure, specifically mentioning 'Britax boulevard weight limit rear facing'. This suggests an attempt to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/strik?utm_term=britax+boulevard+weight+limit+rear+facing PDF link annotation
    • https://fipogelijemebu.weebly.com/uploads/1/3/1/3/131398193/94b3fb549.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496828/normal_5fe2ee7390871.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476595/normal_6000822c523c4.pdfIn PDF document text
    • http://opensoda.pro/dumijusifuxet3o4g1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427499/normal_5fedf71b5f834.pdfIn PDF document text
    • http://tenakororor.iblogger.org/jasopezujobojepamusigisa.pdfIn PDF document text
    • http://magic-spring.com/stuart_wilde_books93h9r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366327/normal_60641788d4c7e.pdfIn PDF document text
    • http://zarabotok.space/92072556674bn2cn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402504/normal_603172c927542.pdfIn PDF document text
    • https://pilidikuvitas.weebly.com/uploads/1/3/4/7/134766888/dce9e3ec3f733a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366957/normal_60381213143f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366397/normal_5fd26c39480f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410206/normal_5fdeae7676f63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366385/normal_600deb42a3d73.pdfIn PDF document text
    • https://gutinevar.weebly.com/uploads/1/3/4/6/134611255/7ca54797.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410199/normal_6018a685e208e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://donirodep.epizy.com/sabowup.pdfIn PDF document text
    • https://91ca87c2-c493-4616-adaa-fbcec45394e1.filesusr.com/ugd/6116da_b09837a2e7064185b20453ddf798db1b.pdf?index=trueIn PDF document text
    • http://povalimokuwov.rf.gd/siwexogumesegefepivukoti.pdfIn PDF document text
    • http://pupuwejerew.epizy.com/56816616388.pdfIn PDF document text
    • https://82cb18f6-4a40-4824-ac11-10070f72ce02.filesusr.com/ugd/5aec95_f5ffd20e0f634246b35f13865a913ed9.pdf?index=trueIn PDF document text
    • http://vamivesuger.epizy.com/retail_marketing_download.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF644 5664 bytes
SHA-256: 8a2145e1738ef7f30f4847c0fe19a5fe3ac01adc61c69fa1c01bbeef70d67005
font_01_sfnt_off0001097f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1097F 10300 bytes
SHA-256: a04094537bd17629727d81ce599831351c6f2b43eb1bb6a3e9d289f3b34f0084
font_02_sfnt_off00012cf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF0 16076 bytes
SHA-256: b12fd7abebef46c6af06114fd52e3a226bf6873093cd64b6bfea0858fd0ebc42