Malicious PDF — malware analysis report

Static analysis result for SHA-256 794e0dd20ff05fc6…

MALICIOUS

PDF

112.6 KB Created: 2021-05-19 16:57:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 02d6e70609f3ac91bacc36811fb46593 SHA-1: 2d9e068f470b4c40a4578e48efd1b53d265447b8 SHA-256: 794e0dd20ff05fc610e3e93e22e667119086e15e3ed3998ff08d173d4e84807d
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to direct users to potentially malicious websites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a common tactic to drive traffic to attacker-controlled infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/wb?keyword=what%20are%20examples%20of%20biotic%20and%20abiotic%20factors%20that%20affect%20population%20size PDF link annotation
    • https://gezameluloxeg.weebly.com/uploads/1/3/5/3/135393377/4295251.pdfIn PDF document text
    • https://dutosagow.weebly.com/uploads/1/3/0/7/130775111/xuxixugakodamo.pdfIn PDF document text
    • https://vogaxuruxav.weebly.com/uploads/1/3/4/3/134352923/jugojosiperagajod.pdfIn PDF document text
    • https://bituxusod.weebly.com/uploads/1/3/4/3/134347303/wewigibitenofiz.pdfIn PDF document text
    • https://ketokaxuvora.weebly.com/uploads/1/3/1/8/131856042/gepawojulanalato.pdfIn PDF document text
    • https://jilukixewe.weebly.com/uploads/1/3/4/0/134042659/pibezovix-runojadoro-faditojiv-josepa.pdfIn PDF document text
    • https://rorezumi.weebly.com/uploads/1/3/4/5/134591247/vaxivonetez.pdfIn PDF document text
    • https://revafabeku.weebly.com/uploads/1/3/4/7/134708131/f21129.pdfIn PDF document text
    • https://tenekitu.weebly.com/uploads/1/3/4/0/134018212/e140b5c60945e.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/bf324e1d-6210-4f1a-8ff1-9842727c13fc/96423303437.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6adfa9ee-a103-4d35-b163-2b045508f12f/84882551238.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f775be15-eee0-4594-bf24-8ed8e0d5498d/heil_furnace_model_number_lookup.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/59108302460.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/bhaktamar_stotra_sanskrit_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/jukulawobizajij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb34c167-be64-432b-a4fb-9d674cce4242/xefiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78c19da2-685f-4145-9a06-5e033081e57c/3793705330.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/bleacher_report_nfl_week_5_score_predictions.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/jetimobagitawapegunaneneg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/941c8c7d-7c7f-4f6e-af39-777f262e6fa4/jesus_the_same_hillsong_chords.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/770fb9d3-d8e1-4bf6-b525-5754c6cf3194/what_book_comes_after_crooked_kingdom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96017a99-11ab-4f4b-a9be-39b748a39707/rhetorical_question_grammar_examples.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000161d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161D3 5664 bytes
SHA-256: 9a8781f2839cc4ea4e7ce072a5538821cdc9f4d018241fa7b537ca60dea4322e
font_01_sfnt_off000174fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174FE 12812 bytes
SHA-256: 5c23760b2398df63a6a7fa8d19634d5961a3840f99e81c3a6f9e4cabcdd2f1d1
font_02_sfnt_off00019eef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19EEF 16148 bytes
SHA-256: 49436f94d5abf10ca6af8af9848174aab82dfe7bc58a5146411d238fd5c76648

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