Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdcc3a2fabbd71ff…

MALICIOUS

PDF

82.0 KB Created: 2021-02-28 19:08:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 37eebb80f204ae64274860762de77e8c SHA-1: a3d2e1b7929c10abcd510c02fbf6652a7ba7b210 SHA-256: bdcc3a2fabbd71ff8e52a9d570cc0e4421ceb25ed08b66d092205350e9061c1d
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/strik?utm_term=english+to+gujarati+dictionary+offline+download'. The embedded document body, though heavily obfuscated, contains text related to 'English to gujarati dictionary offline download', suggesting a lure. The ML classifier and ClamAV detection further confirm the malicious nature of the file, likely used as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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=english+to+gujarati+dictionary+offline+download In PDF document text
    • http://numulul.mygamesonline.org/biziwemabedexej.pdfIn PDF document text
    • http://vidclips.design/lottery_scratchers_games71yz.pdfIn PDF document text
    • http://linorusani.iblogger.org/24536613890.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479917/normal_5fe4e7fe7782d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416659/normal_5fed91452ddb3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502721/normal_5ff64f6825f42.pdfIn PDF document text
    • http://warixedivukinat.mygamesonline.org/42326984361.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379849/normal_5fef4f56f37a8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384029/normal_5fff545573e61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422373/normal_60249257097cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466689/normal_5fcc5de4a1381.pdfIn PDF document text
    • http://tuwukadinem.mygamesonline.org/surah_al_mulk_ayat_1-10_rumi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495059/normal_6028707a95c91.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wokobudedisete.rf.gd/ssr_125_exhaust_heat_shield.pdfIn PDF document text
    • http://girofili.myartsonline.com/the_way_we_live_now_susan_sontag.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_off0000fee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE0 5512 bytes
SHA-256: 072f418541458e022dfcd30035ff8ec26f4178aeec690956796b715030146aa5
font_01_sfnt_off000111bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111BD 11552 bytes
SHA-256: 2795525e4794e8f951b1862525285aadb133f572635708fce388a1fe30281b1a

Open this report in the interactive analyzer, or submit your own file for analysis.