Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b1ad3d4345581bb…

MALICIOUS

PDF

72.9 KB Created: 2021-03-23 16:40:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0337dc6190c564627941db53a7589c8d SHA-1: d18ce12e65e1de599f74b790f09f3bbcd147d850 SHA-256: 0b1ad3d4345581bb3de5d52f49f88bb643e30da48845a87743e05835726af8da
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains embedded URLs that likely lead to phishing content or malware downloads, aligning with the Spearphishing Attachment technique. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/award?keyword=burglary+insurance+definition+pdf
    • https://static.s123-cdn-static.com/uploads/4486351/normal_5fcb3a76692df.pdf
    • https://cdn.sqhk.co/fezajuwu/hieKiie/82104468352.pdf
    • http://topdouche.xyz/my_fire_alarm_keeps_beeping_oncemqucb.pdf
    • https://cdn.sqhk.co/bogonelemid/IageJoY/82326075516.pdf
    • http://apeech.ru/64004071820cdgnu.pdf
    • http://bcpzonasegur4viabcp.com/how_to_reset_canon_pixma_mp250ng5i3.pdf
    • http://world-wild-shop.com/pinomexotiwamatezibodpdaw.pdf
    • https://cdn-cms.f-static.net/uploads/4501041/normal_6047c1305218b.pdf
    • https://static.s123-cdn-static.com/uploads/4409239/normal_5fe4f507824a5.pdf
    • http://ttop-shop.com/dell_optiplex_7010_sff_core_i7-3770d3vss.pdf
    • https://static.s123-cdn-static.com/uploads/4412380/normal_6003c083416ae.pdf
    • https://static.s123-cdn-static.com/uploads/4490256/normal_5ff392fbda444.pdf
    • http://in-arenas.com/does_mcdonalds_sausage_have_carbsl0xnl.pdf
    • https://cdn-cms.f-static.net/uploads/4470222/normal_604464fcc8188.pdf
    • https://cdn-cms.f-static.net/uploads/4366024/normal_6014c59f91085.pdf
    • https://cdn-cms.f-static.net/uploads/4401703/normal_600cc1fb9b3fa.pdf
    • http://circus.market/sopobigepugor63lw.pdf
    • http://bufanono.iblogger.org/46282407436.pdf
    • https://cdn-cms.f-static.net/uploads/4444856/normal_604af357e3371.pdf
    • http://rentline.pro/feniwotirovipfg57.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wepilujal.rf.gd/pdf_file_merge_python.pdf
    • http://josonulujigos.epizy.com/how_to_know_you_have_a_good_relationship_with_god.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de8d.bin
b342b040e14655afbe833f05b87bfca8f2a28271fea8800d1143017172be92c2
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8D 5476 bytes
font_01_sfnt_off0000f14c.bin
acd059b9012e52afc1b56ff87ca211cae428d4530c79181f70f76b1f5e89e389
pdf-font-stream PDF embedded font (sfnt) at offset 0xF14C 10772 bytes