Malicious PDF — malware analysis report

Static analysis result for SHA-256 0da311c5d7e1720c…

MALICIOUS

PDF

122.9 KB Created: 2020-11-20 02:11:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d1519827d2f0747cc56c2b298ddf1ecf SHA-1: 1d71b8aa37883fc2aa44c8a1da7dd817a9c2172c SHA-256: 0da311c5d7e1720c72756434a1fc4378b41c3d270127e065a9d87c9b2afcf70c
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file exhibits characteristics of a phishing lure, employing SEO link farming techniques to redirect users to potentially malicious download sites. The presence of multiple external links, including a redirector URL, and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate malicious intent. The document's structure and embedded links suggest it is designed to trick users into downloading further malware, possibly disguised as legitimate software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/strik?utm_term=eset+nod32+indir+gezginler PDF link annotation
    • https://faworufobideped.weebly.com/uploads/1/3/2/6/132682851/61b41f3e197be9.pdfIn PDF document text
    • https://sonojija.weebly.com/uploads/1/3/4/7/134723635/8886285.pdfIn PDF document text
    • https://winapusumebut.weebly.com/uploads/1/3/4/6/134695108/jomatu.pdfIn PDF document text
    • https://kobijetiva.weebly.com/uploads/1/3/4/3/134322382/6013c4f7.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/depeviteroxovasagela.pdfIn PDF document text
    • https://wogijelagorezu.weebly.com/uploads/1/3/4/0/134096035/xeniwebinevubub_bujarelaxif.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/tetenifeme/mobonesapimojisurobewomi.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/97065822621.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a700834a-e755-4a4c-a290-89e96f9e97fb/verapiketuzo.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/texija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/def450be-3b8f-4702-bf74-6ba2c6bb0a65/balancing_chemical_equations_algebra.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/27155284093.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/939fa926-5446-472e-820d-86ddd3cdf5b3/san_cipriano_libro.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/25971676071.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/birla_sun_life_mutual_fund_application_form.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_off0001a151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A151 5088 bytes
SHA-256: 335e024a384f3fb5fce7e68aa1eb8defe3cca0d01c6a00ff176602e4baeb697b
font_01_sfnt_off0001b2b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B2B9 13492 bytes
SHA-256: 2a427524f09fac61906f64a511db33aaeae123e2a4748ad904c3e6e980bf0ad1