Malicious PDF — malware analysis report

Static analysis result for SHA-256 a006369bbbe7185f…

MALICIOUS

PDF

83.1 KB Created: 2020-12-17 20:44:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6e29619fa427660de9ae8b4426e76798 SHA-1: e603acd4ab5866add7b2eb93b99871b7b3f1f54e SHA-256: a006369bbbe7185f0c99dc843bf7a8de0325b2864e0565b68090d0423ac66da6
96 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 prominent URL, 'https://trafficel.ru/123?utm_term=assassin%2527s+creed+4+parents+guide', suggests a lure related to game guides, potentially for SEO manipulation or phishing. While no scripts were directly extracted, the PDF structure and extensive external linking indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://trafficel.ru/123?utm_term=assassin%2527s+creed+4+parents+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413707/normal_5fb569adab673.pdfIn PDF document text
    • https://pelixenebedevo.weebly.com/uploads/1/3/4/3/134338689/5064322.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/9119805442.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d4752bbd7406580625ec/t/5fc21c4ef8cdb769c62b84d6/1606556751614/physical_science_crossword_puzzle_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/21325193000.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/netacad_cisco_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/ignou_meg_exam_date_sheet_december_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/nujosuwemedadi/chemistry_chapter_1_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/anbe_peranbu_song_isaimini.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/zunuxofiwozedokum.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5729540f1034a5cc777a2/t/5fd72497c4373837b924423c/1607935130584/64_bit_java_runtime_environment_free.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/3d_games_2018_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/dumitupisu.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/42441524567.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_off000108ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FF 5320 bytes
SHA-256: 88d2706bf344ec1b596cae34aed98be761697ec46095ebf5882c953e67e48c5c
font_01_sfnt_off00011b35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B35 10544 bytes
SHA-256: ce79649c0f9aa133cf54d58d8b1755f0a7751a5068f844d4a7a6d84f6b7028c2