Malicious PDF — malware analysis report

Static analysis result for SHA-256 56f2abf9d43614d7…

MALICIOUS

PDF

82.4 KB Created: 2021-03-18 20:09:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 890d6817638ad76006b2ad8901fbf43e SHA-1: f7a765e73fc6c44698cdbe78912bfff285428896 SHA-256: 56f2abf9d43614d72a2046f32163e9d535698edce473d1bbb70cb64777fe50a8
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to 'office expenses spreadsheet template'. No scripts were extracted, but the extensive link farm points to an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://resalured.ru/123?utm_term=office+expenses+spreadsheet+template PDF link annotation
    • http://teachost.com/craftsman_dls_3500_for_saleg5mw1.pdfIn PDF document text
    • http://dfds.in/88721398053h2g4.pdfIn PDF document text
    • http://trylait.pro/sears_router_model_315.174sri3u.pdfIn PDF document text
    • https://kinoxumore.weebly.com/uploads/1/3/4/4/134463035/5181509.pdfIn PDF document text
    • https://roboxojepuz.weebly.com/uploads/1/3/4/2/134235986/a5bb5.pdfIn PDF document text
    • https://cdn.sqhk.co/botikavanov/jS2hiUu/silver_cloud_inn_portland_airport.pdfIn PDF document text
    • https://cdn.sqhk.co/gotakavapu/ihbjCif/81682025319.pdfIn PDF document text
    • https://lodovape.weebly.com/uploads/1/3/5/3/135350971/2423491.pdfIn PDF document text
    • http://butinejijobu.iblogger.org/16025459945.pdfIn PDF document text
    • https://sogenaluvejor.weebly.com/uploads/1/3/4/3/134328850/bofaladodiju_tolararuba_fewapewoje_zazokakijajuw.pdfIn PDF document text
    • http://brumbum6.xyz/23671630303r2foo.pdfIn PDF document text
    • https://tofikopu.weebly.com/uploads/1/3/1/3/131381225/1037930.pdfIn PDF document text
    • https://cdn.sqhk.co/pabilere/gjgggJe/bumawiwaverotelot.pdfIn PDF document text
    • http://raisinsapp.club/the_game_by_neil_strauss_audiobookszqfx.pdfIn PDF document text
    • https://felabare.weebly.com/uploads/1/3/0/7/130776415/8290989.pdfIn PDF document text
    • https://xizevidunofi.weebly.com/uploads/1/3/4/3/134321119/kefajobedetagol-jekuvigebol-vugizubikab-vomudexunagif.pdfIn PDF document text
    • https://zadopelujon.weebly.com/uploads/1/3/4/8/134884154/mowef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lokedexipexeles.rf.gd/74466797830.pdfIn PDF document text
    • https://5bf49506-6ef1-42f8-8f90-7e3689255fd3.filesusr.com/ugd/8fe1bf_709405274a7a4d339be6b67f482ae448.pdf?index=trueIn PDF document text
    • https://59b17237-83b3-47c6-9d40-f547da5b0434.filesusr.com/ugd/827194_9a95dfd54e1248f093535b7b04b4e393.pdf?index=trueIn PDF document text
    • https://0e67983c-e844-40c9-b604-97311ec94efe.filesusr.com/ugd/6e13d9_2cd20ac08b1e43ef84f3efadd2025bfd.pdf?index=trueIn PDF document text
    • http://vaterojot.epizy.com/baxiri.pdfIn PDF document text
    • https://d90bda3b-35dd-409f-9d4b-b4a00d881a52.filesusr.com/ugd/b88e3d_7da476bf36ee4392bb1c3ceed95edc8f.pdf?index=trueIn PDF document text
    • https://e5aadbcf-511f-4ee2-989a-4410a22eeed0.filesusr.com/ugd/64930c_9fac0957aa754206aeadd2b95c425804.pdf?index=trueIn 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_off000105ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AE 5488 bytes
SHA-256: eb9b2d6262ba84ea42c96b6e68a54e1041ea37a240883d7589d9a3b3ed2592a5
font_01_sfnt_off00011837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11837 10424 bytes
SHA-256: e7677b6b9669528431e9dff76b074e73e2134d1543819efe135716d07f5d0b10