Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb8fd434995ae994…

MALICIOUS

PDF

73.2 KB Created: 2021-01-25 06:01:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 548772345c5b10f9865814484f999e59 SHA-1: 1aff3016a6d06c2e965f5ce07a41f03ca6f9d308 SHA-256: bb8fd434995ae9949d42f13051ddf94761030d7cd90bad2a3ad071d3056bea02
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/wb?keyword=grey%20world%20map%20print PDF link annotation
    • http://good-production17.site/22544278912lelpz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451033/normal_5ff3de97d23de.pdfIn PDF document text
    • http://proita.space/94925718390cms7w.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404490/normal_5fec939eb1215.pdfIn PDF document text
    • https://nekonidi.weebly.com/uploads/1/3/0/9/130969497/c836843aa614.pdfIn PDF document text
    • http://help-bluebadgecustomer.com/22428472633lnwra.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382406/normal_5fec42149e46a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381081/normal_5fcc3eb6d6a15.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/muxegeza/sensors_and_actuators.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/xoxoworegopasox.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/ranivuzepajatudozixegun.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/clickshare_cs-_100_quick_start_guide.pdfIn PDF document text
    • http://wekidezeze.epizy.com/english_grammar_in_use_murphy_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/61112203761.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/30289630071.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_off0000e3aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AA 5152 bytes
SHA-256: 2009f51103b676c6adf4e9280071553d05ff0f002bb374008d629db00b983d12
font_01_sfnt_off0000f534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF534 10256 bytes
SHA-256: 7e00e51e493341b6c6b252af6685dbada2cb403c519928f75caa4cb9d1fac66b