Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbdff2ef68bd6034…

MALICIOUS

PDF

88.9 KB Created: 2021-05-22 17:15:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 17765071f529334097ad4b68765c3d2f SHA-1: 452016501adb6c85c7c68464773c7a0f73d525d4 SHA-256: fbdff2ef68bd60340498c8a68d968fd9f81663168167cadb1cd3003a6d1b043e
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's part of a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, contains text related to 'Skyrim' and 'enchanters elixir', likely a lure to attract users searching for game-related content. The presence of numerous external URIs and the link farm heuristic strongly suggest this document is a component of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/strik?utm_term=skyrim+where+to+find+enchanters+elixir PDF link annotation
    • https://dalegoronatodul.weebly.com/uploads/1/3/4/3/134309481/1040704.pdfIn PDF document text
    • https://wawodedirikib.weebly.com/uploads/1/3/5/3/135348651/7436eb.pdfIn PDF document text
    • https://fozejabaf.weebly.com/uploads/1/3/5/3/135305581/6aa670dc5b.pdfIn PDF document text
    • https://lekodapodigix.weebly.com/uploads/1/3/4/5/134500142/9630102.pdfIn PDF document text
    • https://fuzewejobedogu.weebly.com/uploads/1/3/1/4/131482867/miwikaga-romodofepujefe-koduk-fovanefuronofu.pdfIn PDF document text
    • https://xadidevoki.weebly.com/uploads/1/3/0/8/130873902/7460ba640363cf.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/5f6b99f3-4eb3-45b1-8186-d2d805feddaa/zuwajada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eb8c4ee-6427-4aa6-bdf8-3321b93bc14f/gigonufelofugezesular.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d89dd52-99a9-4d17-9960-2fab0d6f1596/80637535483.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d80cb4e6-0ef9-42ec-9f87-c3a012222ebf/vizogewejajezokikokorufi.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/video_er_app_apk_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33ed54bd-4236-4e1d-bd51-7b4d06513ab5/nosexabibuzukivali.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/titisuvoterekekufelamujim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af3e4787-4e15-438a-b489-904a75f5fa9b/analyzing_graphs_of_functions_and_relations_1-2.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/technical_inspection_report_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd7b42bf-bff7-4421-92c9-6ee819be2d74/detuva.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/what_is_the_best_science_fiction_book.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/classic_literature_powerpoint_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7748ff45-05fe-47e2-ba8d-f2e5767826cb/62597530177.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/is_samurai_champloo_historically_accurate.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_off00011883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11883 5688 bytes
SHA-256: d7acbeea495b96411eaea4ddb0c9fd8229e8ca44f9339047c49b11475aafb3a9
font_01_sfnt_off00012bd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BD2 12880 bytes
SHA-256: 6ceb3014356892f71c2bc56ca8f61fb71297ee253fc61d97be58fedd268a62b5