Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e84bf4ae58bca9…

MALICIOUS

PDF

81.4 KB Created: 2021-03-29 11:25:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 791dad54e88073b68a2ff7d4cbfd957e SHA-1: 0ed57f19b90a7f029737d94f5b2a051be44ab437 SHA-256: 47e84bf4ae58bca98c94c7a394fbeb25499f7572e3a8a047b09b270ba6825a31
252 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to disposable hosting or known malicious redirectors. The primary malicious URL identified is https://yafferge.ru/strik, which is flagged as a malicious redirector. The document's content, though heavily obfuscated, appears to be a lure for a shotgun sale, likely to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://yafferge.ru/strik?utm_term=sears+model+200+12+gauge+shotgun+for+sale In PDF document text
    • https://static.s123-cdn-static.com/uploads/4417023/normal_5fcb39b46352a.pdfIn PDF document text
    • http://vodekageka.22web.org/kixidofuzukebukevati.pdfIn PDF document text
    • https://cdn.sqhk.co/mukibusu/jrmQ5jd/digihud_pro_speedometer_1._1._7_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mewobonovagi/4jcijia/best_romantic_ringtone_2020.pdfIn PDF document text
    • http://xulagamefedaruv.22web.org/16877061185.pdfIn PDF document text
    • http://panokaluwavivar.iblogger.org/mugajufuvig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454546/normal_603f934a71727.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465556/normal_5fd3d9201d6b3.pdfIn PDF document text
    • https://cdn.sqhk.co/jivaduzar/XcfVkVx/women_s_world_cup_golden_boot_winners.pdfIn PDF document text
    • https://cdn.sqhk.co/bebumila/iihXjbI/game_project_igi_1_for_pc.pdfIn PDF document text
    • http://pudirexuzil.iblogger.org/10756556199.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454546/normal_605c8cab86e84.pdfIn PDF document text
    • http://mipojegukomil.iblogger.org/namix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5e6d3f51-9b35-4a29-baf4-1f036254a461.filesusr.com/ugd/99a8f2_451f2d473d814a00b787ed5041988b69.pdf?index=trueIn PDF document text
    • http://mamitepibo.epizy.com/tegigujik.pdfIn PDF document text
    • https://6d4a8fb0-9a8a-4850-8aa1-2b5706121c9a.filesusr.com/ugd/ff2e72_0cc444d0cdf742f3b68e82bb4d35f532.pdf?index=trueIn PDF document text
    • https://2a07c75e-e898-48ba-b326-4cccc82d0599.filesusr.com/ugd/ff154e_0b2cacdb20b240309cd9f78d7b990dee.pdf?index=trueIn PDF document text
    • http://vozukaridox.rf.gd/d_d_5e_changeling.pdfIn PDF document text
    • https://2eda13a9-9e0f-47dd-bbfa-a9a5028a3314.filesusr.com/ugd/61c57f_6e89f673fec24518aafc10bdad191e54.pdf?index=trueIn PDF document text
    • https://a6053a4b-6066-498d-92a8-7748b68531bc.filesusr.com/ugd/5f0d2f_bfc9f3b2f41448cf9bea26d4cbd41988.pdf?index=trueIn PDF document text
    • https://fd0ef26f-7b8f-4c91-b3b2-19f7ec93487a.filesusr.com/ugd/4174bf_6aa6e8a97a01404a9d9e1fcf62e5460e.pdf?index=trueIn PDF document text
    • https://748e6e98-33e2-4bd1-95aa-01ea3505a154.filesusr.com/ugd/704f6c_38b3a29207dd423d9ddb12802829532f.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE795 5752 bytes
SHA-256: 42010aef896239d69f4711ba426c0f9ab356a3fc3c2424c5201f598a8eb03e08
font_01_sfnt_off0000fafb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFB 11468 bytes
SHA-256: 10c2256d1b42cbbde6ef7365532c4da08875b5877bb83f078937aba05f962980
font_02_sfnt_off0001226f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1226F 16344 bytes
SHA-256: 9c47a8ecf7103172530608de19fa11afb8a035ab51042e9cb8c6809f09ebb189