Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c1e76b99d357258…

MALICIOUS

PDF

81.8 KB Created: 2021-04-05 10:49:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 902ebe703f4f9ba6eb561c1eeb54776f SHA-1: b2fea831dd77ad47a358d0d6652af714ce4fe278 SHA-256: 1c1e76b99d3572586012aaae97b4c74594e460eb07a6cecdcc6212c9d5764b69
126 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm, embedding a large number of external URLs, many of which point to disposable hosting services. The document body, though partially corrupted, suggests a lure related to technical issues with an Xbox controller. The ML classifier strongly indicates malicious intent, and the presence of numerous external links suggests the document's primary purpose is to redirect users to potentially malicious sites for further exploitation or content delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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://jacksth.ru/strik?utm_term=why+won%2527t+my+wireless+xbox+360+controller+connect PDF link annotation
    • http://pemufosapakem.mypressonline.com/bavusubun.pdfIn PDF document text
    • https://suxegetolikas.weebly.com/uploads/1/3/4/0/134097713/vewale-rixovu-padejapabetaweb.pdfIn PDF document text
    • https://rofujerejikuf.weebly.com/uploads/1/3/5/3/135388349/6380010c35d0f4.pdfIn PDF document text
    • https://jiwosanoxonu.weebly.com/uploads/1/3/5/2/135299962/fegudifazi.pdfIn PDF document text
    • https://gunujudota.weebly.com/uploads/1/3/2/3/132303168/xulenanal-tatuvuwen.pdfIn PDF document text
    • https://kolenogu.weebly.com/uploads/1/3/1/8/131871799/nirakejorum.pdfIn PDF document text
    • https://cdn.sqhk.co/xojurolaruk/g4B6dgi/swatch_watch_guards_80s.pdfIn PDF document text
    • http://mixezitubut.mygamesonline.org/monejurabotuvifabu.pdfIn PDF document text
    • https://cdn.sqhk.co/pefisemise/Ejjhgij/city_hot_wheels_racer_x.pdfIn PDF document text
    • https://sasominafa.weebly.com/uploads/1/3/4/3/134362810/kotuwozilob.pdfIn PDF document text
    • http://mereritijazos.scienceontheweb.net/que_es_la_calcitonina.pdfIn PDF document text
    • https://vupagivoro.weebly.com/uploads/1/3/4/3/134314863/sasajugogufar.pdfIn PDF document text
    • https://taruwimogepumo.weebly.com/uploads/1/3/4/3/134331568/260e16563b97.pdfIn PDF document text
    • https://gavixidosoxadi.weebly.com/uploads/1/3/0/7/130776067/benifitikikitaf.pdfIn PDF document text
    • https://namazowofurap.weebly.com/uploads/1/3/4/3/134372349/58e20b71a.pdfIn PDF document text
    • https://vasetovomakoti.weebly.com/uploads/1/3/2/7/132741031/9178492.pdfIn PDF document text
    • https://cdn.sqhk.co/gidulikegel/acidnwF/23100631596.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://ba10d46a-d7c1-43af-8542-f1a50f31aa8a.filesusr.com/ugd/4dded2_fa81fdb01f0f4dac928d9692f239ef56.pdf?index=trueIn PDF document text
    • https://bb491b24-4c81-4ccc-8daa-bf1baeb171c2.filesusr.com/ugd/93c935_fdabf6b1719e4ed0ae7772fa9fd9ea32.pdf?index=trueIn PDF document text
    • https://d4996ccb-aecf-47c4-aab6-3c4fe022e1b7.filesusr.com/ugd/b7ed05_85065290779b46438ee8f3228c0f5d8c.pdf?index=trueIn PDF document text
    • https://2cc12256-1025-444a-bacb-901a9f007bda.filesusr.com/ugd/d1fcfc_ee5160d915fb485594fc4417f3580db2.pdf?index=trueIn PDF document text
    • https://caf0f927-206f-4b4e-aa34-0dd3da53679b.filesusr.com/ugd/83d902_f62ae11f1a6d40fbac695f982407c992.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000effa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFA 5528 bytes
SHA-256: f4740117930bbdb991d09060a5f2e16003fb8c623d3e8a45748e124c74f12407
font_01_sfnt_off000102aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AA 11480 bytes
SHA-256: dc134bda5c8179d0d67e5617783c87f5ae67f795cb9f67bd353ef2d4499af2ec
font_02_sfnt_off00012979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12979 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361