Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccd707b9b1ebf68d…

MALICIOUS

PDF

99.0 KB Created: 2021-06-08 07:53:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: bc244b26781434d70c03b6f511fa660c SHA-1: 27e4580b66d8fbece09f3d8b8e1a029ea092087e SHA-256: ccd707b9b1ebf68d0ab4add03cd032486ae5110b33d8b8613a98aec9add88f5c
194 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to various resources. The presence of a 'download button' heuristic and the ClamAV detection as 'Pdf.Phishing.Trojan' indicate a malicious intent, likely to trick users into downloading further malware or engaging in phishing activities. The document body, though heavily obfuscated, contains references to resume templates, aligning with a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/123?utm_term=open+resume+template+word+2007 PDF link annotation
    • https://jinepitabo.weebly.com/uploads/1/3/7/5/137515198/2886947.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380863/normal_605cedfd1c1b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485176/normal_5fe0e28cbebc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369329/normal_602d244a6f392.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375355/normal_5fdb2a868875b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381347/normal_60159f5b88c86.pdfIn PDF document text
    • https://pizovepe.weebly.com/uploads/1/3/5/3/135323062/65e04dfdeb3aa4.pdfIn PDF document text
    • https://fitadidexedas.weebly.com/uploads/1/3/5/9/135977916/5af38b59.pdfIn PDF document text
    • https://tolopexe.weebly.com/uploads/1/3/1/0/131070113/3665552.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417422/normal_602b4385d7994.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384296/normal_60bd5cd36a602.pdfIn PDF document text
    • https://kazobutuzag.weebly.com/uploads/1/3/1/1/131164075/2313897.pdfIn PDF document text
    • https://pafuxasakilufa.weebly.com/uploads/1/3/5/3/135327400/sutagurebi_vuriximav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486356/normal_5fdb9bc6da376.pdfIn PDF document text
    • https://fakavenudir.weebly.com/uploads/1/3/4/0/134042443/4709c3236d1b618.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409621/normal_604f77a2ad0a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419820/normal_5fd0592f3ad47.pdfIn PDF document text
    • https://nosodawef.weebly.com/uploads/1/3/4/6/134693330/tepenomif.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
    • https://uploads.strikinglycdn.com/files/43ec4ec7-bc2b-47b6-a2e5-910f0cb33b7b/oh_what_a_feeling_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c9c111e-09f9-459d-9350-32641503cafb/never_underestimate_the_power_of_a_broken_heart.pdfIn 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_off00012b91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B91 5412 bytes
SHA-256: 8a8c37ebd2cd951b1f24d47e908e25b1f6791c8e138975439544be204fa75fc5
font_01_sfnt_off00013df2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DF2 17684 bytes
SHA-256: 8a60acd92e9b29493966e30db6bec0f8d4a94ceb4f91c4af919b124547a5fda3
font_02_sfnt_off00016ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16EDE 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378