Malicious PDF — malware analysis report

Static analysis result for SHA-256 47c38bfc7685fe70…

MALICIOUS

PDF

73.5 KB Created: 2021-01-21 02:28:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 71618f936268789beea3993d87a31556 SHA-1: e86a6008582240eeb7bde4b1d365b89ba6ea84bc SHA-256: 47c38bfc7685fe70b61654b7035346c89726e90afb2a45dcf158fea0f95e6fd8
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. It functions as a link farm, containing numerous external URLs pointing to various domains, likely to manipulate search engine results or redirect users to malicious sites. The presence of multiple external links and the PDF_SEO_LINK_FARM heuristic strongly suggest this is a phishing or SEO spam document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafftec.ru/123?utm_term=happy+birthday+cards+for+sister+in+law PDF link annotation
    • https://site-1178255.mozfiles.com/files/1178255/71301198781.pdfIn PDF document text
    • https://jepemanek.weebly.com/uploads/1/3/4/5/134589705/wudirataj-xojirujozed-vasudefe.pdfIn PDF document text
    • https://site-1178750.mozfiles.com/files/1178750/21721729968.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416805/normal_5fe5b7a55af17.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491445/normal_5fca99e5b89bd.pdfIn PDF document text
    • https://cdn.sqhk.co/nedovipirumu/Pghnghn/cut_the_rope_2_game_download_apkpure.pdfIn PDF document text
    • https://jipuzalo.weebly.com/uploads/1/3/4/6/134693454/xoruxukinemaxow.pdfIn PDF document text
    • https://site-1166600.mozfiles.com/files/1166600/idle_stickman_mod.pdfIn PDF document text
    • https://musonilemif.weebly.com/uploads/1/3/4/7/134752032/porubebogabilu_genizetoz_rafunuwofumak_kamam.pdfIn PDF document text
    • https://cdn.sqhk.co/zejizoguzut/pQ4ghfT/ndsu_football_championship_game_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414860/normal_600298b39a14c.pdfIn PDF document text
    • https://zunitaxipef.weebly.com/uploads/1/3/1/3/131398356/e89daa71.pdfIn PDF document text
    • https://ridogorizaloliv.weebly.com/uploads/1/3/4/5/134527302/5782268.pdfIn PDF document text
    • https://peziwotikiju.weebly.com/uploads/1/3/4/6/134602895/26dab6473ab0.pdfIn PDF document text
    • https://korisupugi.weebly.com/uploads/1/3/5/3/135308649/f028bcdfd3c22f.pdfIn PDF document text
    • https://tanafojapazikop.weebly.com/uploads/1/3/4/5/134576724/1345558.pdfIn PDF document text
    • https://numeroluxovuz.weebly.com/uploads/1/3/4/7/134733954/cabf79d1507.pdfIn PDF document text
    • https://fupefodomixeja.weebly.com/uploads/1/3/4/8/134889506/93662.pdfIn PDF document text
    • https://repotadidutu.weebly.com/uploads/1/3/4/3/134310826/guzejeninanurugenuze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443372/normal_5fe4f08810a8f.pdfIn PDF document text
    • https://jenamojid.weebly.com/uploads/1/3/1/0/131070605/fe35230e.pdfIn PDF document text
    • https://site-1175261.mozfiles.com/files/1175261/sonny_with_a_chance_zora_2020.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_off0000e162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE162 5540 bytes
SHA-256: 55a1a03d8ddadf3f0dc23a230811a6eef202c2a2b28a83e5ab8c447398a97122
font_01_sfnt_off0000f43f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43F 10596 bytes
SHA-256: f6953a0a08b19c399fddc2590d175735d93dc1d6366ebc5f3095be460d256089