Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaa0d97ecfe7b737…

MALICIOUS

PDF

77.8 KB Created: 2021-06-09 09:54:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 5ddcb8b6a706667ddb50285d40ba0115 SHA-1: 4b73fc4229d291f823d73499fa4fce5106021abf SHA-256: aaa0d97ecfe7b737618230956d832d0aea7e1c727ecffe292277637364de10b4
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm of external PDFs, with the primary URL being a lure for 'Game of Thrones season 3 1080p download'. The presence of numerous external links hosted on disposable domains suggests a phishing or malware distribution scheme. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • 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://catamma.ru/pbw?utm_term=game+of+thrones+season+3+1080p+download PDF link annotation
    • https://werovowota.weebly.com/uploads/1/3/4/7/134766705/visosumukafe-katilakodi-tisivufopivo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413564/normal_6054d5a86587b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383678/normal_600eef95f132e.pdfIn PDF document text
    • https://nusomosuguxapo.weebly.com/uploads/1/3/4/6/134693055/7649629.pdfIn PDF document text
    • https://likemopulijufo.weebly.com/uploads/1/3/0/7/130739197/0a5ead821c92f.pdfIn PDF document text
    • https://tesujirigagorin.weebly.com/uploads/1/3/4/8/134869290/fowazemo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458132/normal_601cdbcd476ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390092/normal_6006b5c4befbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417419/normal_6010a3f96bd0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420230/normal_60bcfb132927b.pdfIn PDF document text
    • https://sovurides.weebly.com/uploads/1/3/5/3/135349611/tixukepa-gupukifik.pdfIn PDF document text
    • https://zetidikusas.weebly.com/uploads/1/3/4/7/134740093/suzusiguzi.pdfIn PDF document text
    • https://wuzajamepoxomis.weebly.com/uploads/1/3/4/0/134096323/1bc77e4c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383921/normal_5fcf48ce85f03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457563/normal_60b902f6c3789.pdfIn PDF document text
    • https://pujokabotavigel.weebly.com/uploads/1/3/7/5/137515201/piredenobevolu.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/d671eb99-99b2-4664-a0c7-f8b24cbc46b1/kebadujud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be950741-87b8-4f76-adae-2aa765bc0187/photoshop_shortcuts_mac_vs_windows.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46ae5095-bcf4-4b95-aa9c-61b4e7f88259/humanist_learning_theories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/864f2881-f158-4d0d-bef3-45ef2126399d/what_is_the_difference_between_amc_10a_and_amc_10b.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cacc4490-35cb-4096-8e8d-4ff33a5d8ff3/what_is_the_flower_of_life_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30e12603-0d4b-4bc9-a48b-90efe925ca30/game_changers_movie_netflix_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7038135c-4c62-41d9-81c9-a9b2c7674b6a/22647029796.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_off0000efbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBC 5956 bytes
SHA-256: 306b9a79ab99743ede1fc0095a157f309dbbe4acf74046c2973250712bfd5008
font_01_sfnt_off000103f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F1 11080 bytes
SHA-256: f9d3af51d2a3661b6518fa18d72c101833370bfec0ffc2cbdc3c15672dcab086