Malicious PDF — malware analysis report

Static analysis result for SHA-256 e155e2727a534e44…

MALICIOUS

PDF

70.7 KB Created: 2021-06-09 21:42:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 6752c1fb404abd08957fd2a999e95c22 SHA-1: e6f961027a4391a9531d095a361135a89c96b237 SHA-256: e155e2727a534e44bd8a4206da55435221fa5675eb7823e9f0e44a6a907612ea
126 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 employing UTM parameters, indicative of a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identified as a phishing trojan. The document body, though partially corrupted, contains text related to 'Euro truck simulator 2 cheats codes for pc', aligning with a common lure tactic to attract users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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 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://archism.ru/pbw?utm_term=euro+truck+simulator+2+cheats+codes+for+pc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379355/normal_60bba688d1a34.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428061/normal_5fdfcc962933a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426955/normal_6037c0b0eb9c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476780/normal_5ff8d4f47a7e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452612/normal_601f9a9ab3c22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482848/normal_6058fdf560585.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379362/normal_6048051e484f3.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4496372/normal_60b04c44d0adb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371261/normal_60b952a5e553c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412403/normal_603e378c1eb0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474191/normal_5fea12c027ec1.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/d1d09cb8-ae81-4fea-9ec4-1c92ea279d24/gogugatepokijapagozob.pdfIn PDF document text
    • http://numefen.pbworks.com/w/file/fetch/144539298/poxavulapuvemadedobivo.pdfIn PDF document text
    • http://likanegi.pbworks.com/w/file/fetch/144671529/89546115125.pdfIn PDF document text
    • http://felefejimax.pbworks.com/f/is_spongebob_sponge_on_the_run_out.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9319d59e-58d0-4442-967a-c834755fd424/how_to_use_duo_sv_instant_pot.pdfIn PDF document text
    • http://tukufidanega.pbworks.com/w/file/fetch/144615948/simile_and_metaphor_worksheet_2nd_grade.pdfIn PDF document text
    • http://javefanudosa.pbworks.com/w/file/fetch/144518115/how_would_you_describe_food.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cfb7702-18c6-4bce-9098-abc171d0e0d7/apple_books_am_pc.pdfIn PDF document text
    • http://kivotin.pbworks.com/f/48361176008.pdfIn PDF document text
    • http://gediripu.pbworks.com/w/file/fetch/144947244/eng_grammar_class_9.pdfIn PDF document text
    • http://banusiv.pbworks.com/f/story_saver_apk_instagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89038502-dc5c-44ed-a83d-fc1d03b35a73/mibuv.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_off0000d5a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A0 5548 bytes
SHA-256: 66bd33b11a4c8e55ad2404082d92e3dd27452df917b3eb7d3cf55e7e6f3f16e7
font_01_sfnt_off0000e85d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85D 10524 bytes
SHA-256: e70348b8560b9103c525ca168d19274004802ee7ca3f69ba46e01b8806489e88