Malicious PDF — malware analysis report

Static analysis result for SHA-256 08d609e9409af067…

MALICIOUS

PDF

78.1 KB Created: 2021-03-19 04:34:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9f22a920a18d21da2262259c6b39ad09 SHA-1: 249b11be43f344304301979f4b50f38c9e65c899 SHA-256: 08d609e9409af0679f9a45726476a2476bc620f4c0e847822b5a1bc338cb6fbf
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains and potentially malicious sites, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://seumenha.ru/strik?utm_term=samsung+mini+split+trouble+codes PDF link annotation
    • https://jopuxokoxi.weebly.com/uploads/1/3/4/3/134350500/fuxelaxulebe.pdfIn PDF document text
    • http://cartest.pro/68270666581a2v3j.pdfIn PDF document text
    • http://xegazinijitup.mywebcommunity.org/fodinobub.pdfIn PDF document text
    • http://lebedugipul.mywebcommunity.org/who_has_the_most_wives_in_the_bible.pdfIn PDF document text
    • http://static-get.top/70063347504qgsyf.pdfIn PDF document text
    • https://tudaluvakagovax.weebly.com/uploads/1/3/4/6/134614365/1919610.pdfIn PDF document text
    • https://wefidabewurar.weebly.com/uploads/1/3/1/1/131164485/2898949.pdfIn PDF document text
    • https://cdn.sqhk.co/dewufidabo/UtMhieI/87671651701.pdfIn PDF document text
    • https://genezekanoz.weebly.com/uploads/1/3/1/4/131413678/65b045e40a8e50.pdfIn PDF document text
    • https://cdn.sqhk.co/puxedepobe/vig3jfG/pexozojokopubepe.pdfIn PDF document text
    • https://cdn.sqhk.co/modonasuje/iw7xIhg/lumamirelupuwigovil.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/7PihhcQ/download_flying_car_robot_simulator_mod_apk.pdfIn PDF document text
    • https://tafanoxuxirugo.weebly.com/uploads/1/3/5/3/135327873/wubegozipaged-rebixuredumow-nogadijanazune-dapelitov.pdfIn PDF document text
    • http://gizigevom.mygamesonline.org/zuwesogatanevusale.pdfIn PDF document text
    • https://cdn.sqhk.co/bukoxomule/bBhggha/shiseido_color_muse_review.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://01d67eed-50ba-4ccb-8f82-c1581f7ed07e.filesusr.com/ugd/e3325f_e72931e3bce0401cb01a5407accd19a5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e129fa2-70ec-4b70-a30b-8deef7545430/google_wordpress_hosting_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2253844c-9bc8-421d-9d8a-2d3d87ca8fee/54497093558.pdfIn PDF document text
    • https://e108c0fa-8e70-4110-aab7-e0d30777705f.filesusr.com/ugd/d9966b_0b8a82c7240f486aa9d84c32c6fe33c9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f58bedc-6340-4573-bc43-0911a5eb718d/lg_wm2016cw_drum_problems.pdfIn PDF document text
    • https://667abc8f-92ca-45d9-bc9d-789c80a68858.filesusr.com/ugd/dcd78f_d5981638797f45d7b840d32aaf18bb8f.pdf?index=trueIn PDF document text
    • https://0c3b2bb2-3ac9-4e0e-a0b2-530a831cdf0d.filesusr.com/ugd/23193f_a3076735dcec47e6b9e2c52492656cac.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bef270e4-975d-4741-add7-7035cf03be4d/18095354345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/402036ae-e53d-402a-9cc7-4274c05927be/java_8_stream_list_to_map_duplicate_key.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_off0000f1ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AE 5636 bytes
SHA-256: 407ab094e24d7e3a2765ea431c8b6df57641125bccd1e2bf951fee2c64881a94
font_01_sfnt_off000104bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BB 11064 bytes
SHA-256: 25c80051e1d19b643c271167dc0eab666c90acf75f8258cee3afcbdb37f94871