Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b0be86bf7985899…

MALICIOUS

PDF

67.4 KB Created: 2021-06-14 16:20:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 6f4a36b55cff67fa5f6ef13d4e6a572c SHA-1: 640d0ec547de64ffb9106f52de17ba88878a8e99 SHA-256: 7b0be86bf79858996aa174cb13af94a696065c18203c52c7508874ec2b31a8d6
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to compromised websites, likely intended to lure users into downloading further malware or submitting sensitive information. The document body itself is heavily obfuscated and contains metadata related to its creation, but no direct instructions or lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://huntic.ru/uplcv?utm_term=pound+foot+to+nm PDF link annotation
    • https://transport-vehicules.fr/userfiles/file/sijubopitoxabape.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ce052dd35fdcdb97499b02b92233200b/62865124621.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/c0cda765154e81391e6a60291c3b6e73/levugizesijixo.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/de56lv0eaqi375rh8hjg95e81m/53756880761.pdfIn PDF document text
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/7nc8evsj5pfj9t29bmnq237nj1/xelifepazefuxinemutor.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b01a3100d2e---72253099365.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/19f0ff1f0a435712cb9f9a41a04468ac/37254931761.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/jifuwavesetibiwamedi.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b292d8cca21---6407927273.pdfIn PDF document text
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/digizanoted.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/polifitupo.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/12934363489.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160970262a1265---87519279761.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/4271a0ed2a3260db08c6924deaf09436/rotid.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-5-6/20210506225339752064.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/mikowimozuligeso.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/11473795345.pdfIn PDF document text
    • http://jlm-kg.com/uploads/file/4524542409.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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_off0000c19e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC19E 4256 bytes
SHA-256: fc5e187c88b8c20bb766a7be4b11091887de3b30a5580d178fc75fe4760564d3
font_01_sfnt_off0000cfea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFEA 10504 bytes
SHA-256: d6c7dc6674fb3b7c6294cf92ccd339e1e722c70f698d6404d7d841d359202bc7
font_02_sfnt_off0000f2bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BB 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378