Malicious PDF — malware analysis report

Static analysis result for SHA-256 3511f629b0c39984…

MALICIOUS

PDF

72.1 KB Created: 2020-11-19 21:39:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3cc65c5c6ade52ab11b51e559cc8184a SHA-1: ec90c67e84c8973d6f29a5b974d0c9b4b0e8360a SHA-256: 3511f629b0c39984c8eda8e05ef9b8354d9a46ca4fbbe5de8529f63069881ff5
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file exhibits characteristics of a phishing lure, employing a link farm strategy with numerous external links to redirectors. The primary redirector URL, 'https://trafffe.ru/123?utm_term=skittles+half+life+lab+answer+key', suggests a potential attempt to trick users into believing they are accessing legitimate content. The high ML score and ClamAV detection further support its malicious classification, indicating it's likely part of a phishing campaign.

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://trafffe.ru/123?utm_term=skittles+half+life+lab+answer+key PDF link annotation
    • https://sizamuvexiluti.weebly.com/uploads/1/3/4/6/134644091/5875152.pdfIn PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/9843974.pdfIn PDF document text
    • https://dodojojika.weebly.com/uploads/1/3/4/5/134503072/8798551.pdfIn PDF document text
    • https://ferowadamo.weebly.com/uploads/1/3/4/5/134593689/jowod-xegewemutupupu-lugirafopeter-fegitixuwudijip.pdfIn PDF document text
    • https://nopetozu.weebly.com/uploads/1/3/4/5/134507327/3901933.pdfIn PDF document text
    • https://raralulewuk.weebly.com/uploads/1/3/4/4/134478892/4679388.pdfIn PDF document text
    • https://mokoluwi.weebly.com/uploads/1/3/4/5/134595511/3ae80a666043.pdfIn PDF document text
    • https://bujupovira.weebly.com/uploads/1/3/4/4/134472582/9241050.pdfIn PDF document text
    • https://larogarokod.weebly.com/uploads/1/3/4/0/134018293/6710d58d93f62.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/wusone/sovoderoduf.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/words_with_nym.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/65381585911.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/eulerian_and_lagrangian_description_of_fluid_motion.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/burda_malayalam.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/runkles_red_lion_hours.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/geladeira_brastemp_gourmand_manual.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000daed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAED 5356 bytes
SHA-256: 0fd77a68ec4f4dba04b437bddea22dfd3a4ae4678e0843f14951d0a42d987b4f
font_01_sfnt_off0000ed32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED32 11228 bytes
SHA-256: fa44db1b6c6bdeb1c5548a3b9082683aa41f46217d255857c5573e463d26aab2

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