Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dbc2450096b9ad3…

MALICIOUS

PDF

81.6 KB Created: 2021-03-29 01:19:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 226f4430605f15cbf2bee5a8362ffbe8 SHA-1: 09fd07bdc714760b6f5cebaca2d2099df0937ebd SHA-256: 3dbc2450096b9ad3f89d915838c822b2eddaf456549181eb762bce5bfe3256cb
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 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://mezovuduw.ru/aws?utm_term=what+is+the+average+particle+velocity PDF link annotation
    • http://igme.site/pathfinder_companionn20jd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445739/normal_5ffb4a470c5ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387562/normal_5ff544e556388.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451356/normal_5feb57cc94217.pdfIn PDF document text
    • http://jewlgems.com/safari_2020_price1zqjs.pdfIn PDF document text
    • https://cdn.sqhk.co/bidamasegom/ajhhhii/15707443696.pdfIn PDF document text
    • http://wirelessinfo.ru/faxijerulurufomulig0hod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408702/normal_603290c4c297d.pdfIn PDF document text
    • https://xivunububan.weebly.com/uploads/1/3/0/9/130969166/da97bb528c699d4.pdfIn PDF document text
    • https://vunamesu.weebly.com/uploads/1/3/5/3/135324142/810782.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384026/normal_6019f24aab54a.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/xjagdgi/traffic_rider_hack_2020_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/madagijoj/hhhidst/download_crazy_racing_speed_racer_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391954/normal_600e49f21156f.pdfIn PDF document text
    • https://cdn.sqhk.co/sawomunuj/jJij5ij/risowujavirak.pdfIn PDF document text
    • https://gudabujazoz.weebly.com/uploads/1/3/0/7/130739385/2f74e9aacb8ae.pdfIn PDF document text
    • http://forpost-electrica.ru/songtext_the_power_of_love_celine_dionm30zk.pdfIn PDF document text
    • http://dowotezovemalo.mygamesonline.org/38190140235.pdfIn PDF document text
    • http://sesizuxewewax.mygamesonline.org/analogies_test.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477163/normal_5ff2cbd63df9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411700/normal_6037917d693f6.pdfIn PDF document text
    • http://microbladingeyebrowsdallastx.com/fester_freenas_guidec1uht.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414331/normal_5fe6bba6a26c3.pdfIn PDF document text
    • http://xizugef.medianewsonline.com/ccna_cyber_ops_study_guide_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405437/normal_600a6ebf20008.pdfIn PDF document text
    • http://xerujupuje.sportsontheweb.net/apprendre_a_lire_le_coran_en_arabe.pdfIn PDF document text
    • https://cdn.sqhk.co/vifejoneses/hcjdhii/ganovejuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bavevex.onlinewebshop.net/ancient_history_rs_sharma.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_off0001003f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003F 5372 bytes
SHA-256: ad52cce7edd39c7f842b490276b99d4f83761651520808ec4bf0497de5d2ddc6
font_01_sfnt_off00011299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11299 10992 bytes
SHA-256: 82c1b31413a3135fb627db4562a133b2ce3bc02f95fd52dea11d5940defc38e6