Malicious PDF — malware analysis report

Static analysis result for SHA-256 208d48a372d2ab52…

MALICIOUS

PDF

72.6 KB Created: 2021-01-11 07:15:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2cea96a45632964b9c70e250a91036c5 SHA-1: 759779a9ffee0973a65c98d73b028bebd75428cd SHA-256: 208d48a372d2ab529589b68a46fd87fd9f510fc2fa494d237f54f84af0343953
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The primary URL observed is 'https://traffset.ru/123?utm_term=four+seasons+nail', which is part of a suspected link farm. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', indicating a phishing or trojanized document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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/123?utm_term=four+seasons+nail PDF link annotation
    • https://cdn.sqhk.co/mozedizupi/ashjU3R/sacred_sword_princesses_mod_1._11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371814/normal_5fa41e2fabd85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422144/normal_5fae846756f07.pdfIn PDF document text
    • https://cdn.sqhk.co/lopumilekana/UWieziN/charge_apple_pencil_with_ipad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453560/normal_5fe6e05648170.pdfIn PDF document text
    • https://naketutetan.weebly.com/uploads/1/3/4/6/134660231/618a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388038/normal_5f8de30541a05.pdfIn PDF document text
    • https://cdn.sqhk.co/jagapifa/1EuH1ie/virtual_friendship_and_the_new_narcissism_central_idea.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/jgAhhjd/blackjack_card_game.pdfIn PDF document text
    • https://cdn.sqhk.co/judixixelof/hdhjhhy/newatebazezenafedade.pdfIn PDF document text
    • https://xegogebereduxu.weebly.com/uploads/1/3/1/1/131164392/sozofuxirowo_bubetapexofuwif.pdfIn PDF document text
    • https://cdn.sqhk.co/jagugide/jJjjDji/79816543768.pdfIn PDF document text
    • https://cdn.sqhk.co/pirujezexod/25lKkEo/81791960449.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391915/normal_5fa2b823c4046.pdfIn PDF document text
    • https://cdn.sqhk.co/wujukipako/AA9ijss/drop_it_song_name.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE082 4636 bytes
SHA-256: 4a324f39121d140c7273f937584876a36c875f0d76a5300b3b94060fee552a3e
font_01_sfnt_off0000f050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF050 11288 bytes
SHA-256: c5ceabdd9965349f190add0b00338749659b66c87a2ae4b5b07382c70591d866

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