Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac36a4d9e21ea93c…

MALICIOUS

PDF

68.7 KB Created: 2021-02-18 07:21:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 4ed259485f9a75059c0a95efc8e5da1b SHA-1: 1167cd12113cb67da53ada764bb9263debb83311 SHA-256: ac36a4d9e21ea93cbdb91ca568ca898353944d1dfc753fd46423648864d4c627
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=trigonometry+for+dummies+amazon PDF link annotation
    • https://jexafowasefuxuv.weebly.com/uploads/1/3/4/5/134588667/2574954.pdfIn PDF document text
    • https://molulodanewiv.weebly.com/uploads/1/3/1/6/131606256/kekavub_sabuzubapotutul_momuwufezala.pdfIn PDF document text
    • https://seritixatot.weebly.com/uploads/1/3/1/0/131070849/8020223.pdfIn PDF document text
    • http://hd-cam-mirror-up1.club/100649817150fq6a.pdfIn PDF document text
    • https://gabanifuvumot.weebly.com/uploads/1/3/4/5/134588994/7322691.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449793/normal_5ff3bef6e4201.pdfIn PDF document text
    • https://sipexagugiresu.weebly.com/uploads/1/3/4/6/134607427/xewumurusojexoziru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368474/normal_5fef9976ba595.pdfIn PDF document text
    • http://mushygushysayings.com/42709985976wfqsl.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/gajabedafot/guided_reading_chart_scholastic.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/lenov_ru_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/18732411787.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/formal_business_letter_format_on_letterhead.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/3735240336.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/cloud_computing_powerpoint_template_free.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_off0000d0a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A6 5296 bytes
SHA-256: fd0126d35cad55962fa77c3688df9fab2b8e53c5e2df15b02a133097ceec89ec
font_01_sfnt_off0000e2aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AA 10352 bytes
SHA-256: 643b05bf38fac3083e51b118342a2437fa8286fdc3e9a4bce56b1c7ba6dd7f1a