Malicious PDF — malware analysis report

Static analysis result for SHA-256 acca920c2dbcdea2…

MALICIOUS

PDF

63.2 KB Created: 2020-11-22 04:34:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ea0f183062fd572fee9cde9bae1bcc86 SHA-1: 7c38cb4f86ac5244f03bde9e97f05dcfa1d5bdb2 SHA-256: acca920c2dbcdea2a8c4c1529db91bb3f940e5843defffdf2a5f22892708d1a0
186 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, identified as a link farm, with a high concentration on disposable hosting. The primary URL, 'https://trafffe.ru/aws?utm_term=apple+airport+utility++windows+10', suggests a lure related to software, likely to deceive users into clicking through to malicious content. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a high probability of phishing or malware distribution.

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
  • 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://trafffe.ru/aws?utm_term=apple+airport+utility++windows+10 PDF link annotation
    • https://xibemorebag.weebly.com/uploads/1/3/4/3/134355918/7578801.pdfIn PDF document text
    • https://kobexozabegubom.weebly.com/uploads/1/3/3/9/133999893/c0b24f308fe20.pdfIn PDF document text
    • https://lalidusuferub.weebly.com/uploads/1/3/4/4/134440540/4e207fe917.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449000/normal_5f9f80e09efd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375700/normal_5f9d455e51940.pdfIn PDF document text
    • https://gumopukuzi.weebly.com/uploads/1/3/4/4/134481114/pemamavox_nofedesolanux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375194/normal_5f908eee286a6.pdfIn PDF document text
    • https://vobemebu.weebly.com/uploads/1/3/4/3/134383317/2921034.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411681/normal_5f9d023dab3d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369917/normal_5f88555bda7ad.pdfIn PDF document text
    • https://tuvitewolejuxow.weebly.com/uploads/1/3/4/6/134615754/xuxaronanif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384149/normal_5fb99590540a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489412/normal_5fb2e54c6d7e2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/61065c0d-0715-4c22-bdbe-c87fca326d9b/dixolelopowo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf73716d-1a55-4c9b-9c8d-d38458862794/78484282250.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ff6262a-e948-4a6a-87f4-5735cc72c8c6/buvaximanaso.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB997 5332 bytes
SHA-256: 7574cceb9aca426585f5d527327cb4c30570fbbc82643f2f1837d325d0698f37
font_01_sfnt_off0000cbe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE4 10556 bytes
SHA-256: 5cb849c7405c9dd31d16db3f10a814f07e9c06501e8b41e6e31f92e7075815fc

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