Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ac2ddc7dada446a…

MALICIOUS

PDF

123.3 KB Created: 2021-05-01 17:53:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b806316328e8858562b537b9ce326000 SHA-1: c27ff111096816e42a03d888b96ba34ace9df33b SHA-256: 1ac2ddc7dada446ad6af492b09fd2d7f205ddfb7aa7aadcf91605ceda3d8305c
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, indicating it functions as a link farm. The presence of multiple PDF files hosted on disposable domains and the use of UTM parameters suggest a phishing or SEO manipulation scheme. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://dugedepap.ru/strik?utm_term=dirt+devil+easy+lite+sd40010 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489725/normal_60687ea7dff28.pdfIn PDF document text
    • https://cdn.sqhk.co/wesegagage/jgWjazi/580_traffic_going_west.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471941/normal_606bdb4d06c27.pdfIn PDF document text
    • https://dopuxaponaxu.weebly.com/uploads/1/3/2/6/132695391/6333499493fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370076/normal_60594fbbceac9.pdfIn PDF document text
    • https://cdn.sqhk.co/bujasugawo/8LhhyRW/philadelphia_flyers_roster_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445729/normal_5fdecf34d0348.pdfIn PDF document text
    • https://zuxadozi.weebly.com/uploads/1/3/4/6/134662888/5192834.pdfIn PDF document text
    • https://cdn.sqhk.co/zujumatatub/aFEG6jh/86274593544.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380070/normal_6027380632372.pdfIn PDF document text
    • https://cdn.sqhk.co/zajujinul/hejbokr/dynamixel_xl-_320_arduino_library.pdfIn PDF document text
    • https://vubilidupetox.weebly.com/uploads/1/3/0/9/130970012/tadolomudawori_tanoxero_fusutudu.pdfIn PDF document text
    • https://cdn.sqhk.co/wabitakenina/ii3ljgw/scentsy_warmer_of_the_month_august_2020.pdfIn PDF document text
    • https://mefupajudeto.weebly.com/uploads/1/3/4/8/134883840/8154960.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/bzLn1yT/hattrick_training_calculator.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410190/normal_6033260a50de5.pdfIn PDF document text
    • https://cdn.sqhk.co/pememobuwir/jbYXhg2/17868485981.pdfIn PDF document text
    • https://cdn.sqhk.co/vutazekerubu/jiFy0Qc/carx_drift_racing_online_xbox_one_car_list.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449187/normal_60627e7143321.pdfIn PDF document text
    • https://memelixuluxowi.weebly.com/uploads/1/3/5/9/135958522/1173756.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465687/normal_604ebddf44838.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374545/normal_602c25414586c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423752/normal_5fdf47b354737.pdfIn PDF document text
    • https://cdn.sqhk.co/dopebuxoz/hbhbijg/falaredobubatoxo.pdfIn PDF document text
    • https://cdn.sqhk.co/xiruregexibe/Ojhiip6/25784434003.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388279/normal_6067813149b0c.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000197d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x197D2 2856 bytes
SHA-256: 30505cf77ba8a3f6a71ba56c2bc124282218affb14726b01dc63d1ce4df229fd
font_01_sfnt_off0001a1fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A1FB 5264 bytes
SHA-256: b75029ccaef53783edbb2114c6d4d1942e31f3fe3da05ae0bfd267c19bad1667
font_02_sfnt_off0001b407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B407 14624 bytes
SHA-256: c02862b3e4f6ad7bf6fe78786d7485fa5323c70d03bdc066a14931e7db26fef1