Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8eef5338a14eec7…

MALICIOUS

PDF

75.4 KB Created: 2021-01-12 16:13:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e73d36d1b4e89da62030280cd6d5a1b SHA-1: baf1ab45c5018a73f752b439c620b9f867044ca7 SHA-256: c8eef5338a14eec7c19f3aa5d8745ee5741cf87128fa2a15344af1ba2d140147
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one specifically pointing to 'traffking.ru' and mentioning 'vmware tools'. This suggests a phishing or malware distribution attempt, masquerading as a software update. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffking.ru/aws?utm_term=vmware+tools++10.+3.+20
    • https://cdn.sqhk.co/vefuwebilux/gjaFhiW/74529048881.pdf
    • https://site-1168290.mozfiles.com/files/1168290/8112610865.pdf
    • https://cdn.sqhk.co/nosuterib/Jic9Fhi/pabujoxuvopa.pdf
    • https://site-1178617.mozfiles.com/files/1178617/74538436997.pdf
    • https://site-1174179.mozfiles.com/files/1174179/agile_principles_and_mindset.pdf
    • https://cdn.sqhk.co/wazafepel/hflnhiS/zamokejerilemaniwazama.pdf
    • https://site-1172039.mozfiles.com/files/1172039/blend_it_3d_mod_apk_no_ads.pdf
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/lorewuk.pdf
    • https://cdn.sqhk.co/puwukuwos/fgdJigM/69317800471.pdf
    • https://site-1172149.mozfiles.com/files/1172149/game_launcher_app_for_iphone.pdf
    • https://nesipemuwazona.weebly.com/uploads/1/3/4/8/134881126/f92ebb9e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/petikamov/forensic_files_shattered_dreams_worksheet_answers.pdf
    • https://s3.amazonaws.com/naranofinovujix/xavier_housing_self_service_login.pdf
    • https://s3.amazonaws.com/taturi/escape_room_answer_level_20.pdf
    • https://s3.amazonaws.com/zokokamu/61554752127.pdf
    • https://s3.amazonaws.com/jazuravazaguz/fomiwowagudaguwomifax.pdf
    • https://s3.amazonaws.com/juzinaramip/61883846910.pdf
    • https://s3.amazonaws.com/xeroguru/angkasa_pura_ii_annual_report.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_off0000e83b.bin
8403269d8f3da15266d92f69852aaf127acbac0cda0faf42ad1f62e373ff7efe
pdf-font-stream PDF embedded font (sfnt) at offset 0xE83B 5408 bytes
font_01_sfnt_off0000fa9c.bin
94017f2d5b06172f34447723d4a25ef9321678808906181c9cc08f8ff7ec4f23
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9C 11260 bytes