Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d2b681017a050a8…

MALICIOUS

PDF

71.0 KB Created: 2021-01-14 20:23:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: cff3919ea1edc85c8b8ebc6b9700003f SHA-1: fb4c51b21394b468759de2abe459bdcee54c3ba2 SHA-256: 6d2b681017a050a85677e21abe167de50330d499739af36bfbf5c3285d1388d6
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. The document body, though partially corrupted, contains references to 'Java 8 windows 10 32 bit' and an external URI pointing to 'trafffi.ru', suggesting a lure to download a malicious payload disguised as a software installer. No scripts were extracted, but the presence of external URLs and the phishing classification strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffi.ru/aws?utm_term=java+8++windows+10+32+bit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373264/normal_5fb2d796b07b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390366/normal_5fe93909e4b6a.pdfIn PDF document text
    • https://cdn.sqhk.co/sileluzorupo/gjcCjfa/jezujotewasibidunax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393356/normal_5f92b2e49b367.pdfIn PDF document text
    • https://cdn.sqhk.co/remowiwa/C6ijtha/miraculous_ladybug_cat_noir_game.pdfIn PDF document text
    • https://cdn.sqhk.co/noxomosanena/zkgf4id/70096507104.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391015/normal_5fa897d40ceb0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465125/normal_5fc4eed36450d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387035/normal_5f93b53d3f6c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427095/normal_5fc94466cbc26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503214/normal_5faf43cfadeff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tulosa/upcoming_android_games_2019_mmorpg.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_off0000d8ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AC 5656 bytes
SHA-256: 03857e5e10022df1ceb16df925d5ac0d37ca95c1f7b44838605524660605ccdb
font_01_sfnt_off0000ec13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC13 10612 bytes
SHA-256: 64c332e3b2b05d40b878708822fd1d77996fdbd0dc502c53d5c1d8946e513f95