Malicious PDF — malware analysis report

Static analysis result for SHA-256 e65c98fec3e057a7…

MALICIOUS

PDF

81.4 KB Created: 2020-12-22 03:28:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 936c5438fdddf434e006bede90747aad SHA-1: 991134099f93dfe4d9ddba918508c4b693be0525 SHA-256: e65c98fec3e057a7a952f1e26b1dcd9eb3c4c3373c5a41f901b002e3efb8c06b
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary external links, 'https://traffnew.ru/strik?utm_term=electronic+bingo+board+games', is suspicious and likely leads to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffnew.ru/strik?utm_term=electronic+bingo+board+games PDF link annotation
    • https://xoludebule.weebly.com/uploads/1/3/4/5/134526363/sutojazopafijo_jisejipunen.pdfIn PDF document text
    • https://lilozelis.weebly.com/uploads/1/3/4/7/134715449/geponamuludetazon.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/abe303f2-8e5c-41df-b03f-d386522dcaff/dakexakozoxebitogak.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/pejozokimolowopo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ef3e3c0-af11-4e4f-84e2-d9a548d74382/forskel_mellem_tdi_og_cr4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72db924a-5468-48e8-8d8c-25eed82c3c39/42459874450.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60a8c425-f0c2-4411-83bb-66a70935b3b9/94933155197.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c8fe107-bd52-4cba-bc34-848629348b05/wow_mop_leveling_guide_1-90_horde.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/789051b7-461c-4e8a-9feb-0fb1e51ca69e/22587131603.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc9bbe50f46d6500014148/t/5fdcfe0065c797038f83b818/1608318464795/funojagasagejikazifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bd0830b-f623-48b0-983b-abe1d30ccc76/dichotomous_key_worksheet_answer_key.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f73d1c8c741314321d77/t/5fcd6b46c836a917f920c356/1607297871614/easy_bible_word_search_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96f2a67c-8bba-447b-8eae-959291ea4a49/valor_aposta_18_numeros_lotofacil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a46dd8e4-3c07-47df-b21d-0d21ed918527/66552604928.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ad822a5-9503-4ff7-b635-84b8aff758f6/the_cosmic_distance_ladder_lab_answers.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_off00010346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10346 5356 bytes
SHA-256: 39443e6cc99b1e369f017b728bc7b9cf516052bb46832851ee012511e2867201
font_01_sfnt_off00011566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11566 10404 bytes
SHA-256: 9c372a0e3daed84ed1bdc5d6a2e86c50b9c36f4ee10058ba9f8c59bf2cb30e18

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