Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc38abfea3173591…

MALICIOUS

PDF

79.5 KB Created: 2021-01-25 04:40:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 891c75962b810c6aac9aa9cd99ba9b6b SHA-1: d1e942adb4663d1ebea4619364b4abea49e9ad73 SHA-256: cc38abfea317359179497adb8dc99f02a4a795c41b9470eba686ced05a4a5d5a
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains like weebly.com, indicating a link farm or phishing attempt. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics strongly suggest malicious intent, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://trafftec.ru/123?utm_term=monopoly+millionaires+apk PDF link annotation
    • https://cdn.sqhk.co/xefijumu/haJqAch/top_filters_for_selfies.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372721/normal_5fe8c7e671757.pdfIn PDF document text
    • https://sidafixeruj.weebly.com/uploads/1/3/2/6/132681612/sosadidesokeje.pdfIn PDF document text
    • https://fezagexagowib.weebly.com/uploads/1/3/5/3/135313062/a3ca71.pdfIn PDF document text
    • https://nemelodanunoju.weebly.com/uploads/1/3/0/8/130874480/e0ad93d407.pdfIn PDF document text
    • https://venonaneguwar.weebly.com/uploads/1/3/5/3/135398509/sezid-ziwuzowizo-didara.pdfIn PDF document text
    • https://zotekuruwufuk.weebly.com/uploads/1/3/4/1/134108654/0f65a2f28bef3d.pdfIn PDF document text
    • https://nubipudovolena.weebly.com/uploads/1/3/4/0/134012318/womidubotumedemim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461216/normal_5fd234a8b77c2.pdfIn PDF document text
    • https://rasofenetiko.weebly.com/uploads/1/3/4/8/134862321/dejow.pdfIn PDF document text
    • https://raxokada.weebly.com/uploads/1/3/1/4/131409035/94c67d3773039.pdfIn PDF document text
    • https://sinegozedajosor.weebly.com/uploads/1/3/1/8/131871849/191402830e2.pdfIn PDF document text
    • https://rixotojar.weebly.com/uploads/1/3/0/9/130969533/sarikelamipam-vegilefode.pdfIn PDF document text
    • http://discount50.pro/superhero_costume_camera_photo_maker_app1i896.pdfIn PDF document text
    • https://sumejuloluguwir.weebly.com/uploads/1/3/5/3/135390827/bexuvaro_jilirifago.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366366/normal_5ff8ddc6826bf.pdfIn PDF document text
    • http://antinomi.design/zatinotaxenowexoregpg6ch.pdfIn PDF document text
    • https://sitofozaliwi.weebly.com/uploads/1/3/4/3/134355749/2917564.pdfIn PDF document text
    • http://natur-green.fun/225203819318dxn3.pdfIn PDF document text
    • https://dosukasexu.weebly.com/uploads/1/3/1/6/131637789/0af8341.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414332/normal_5fd08a47ac9ad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7B 4844 bytes
SHA-256: fc1467bbc09d71c39d63d44a4e81051776ad527f4223314bf660bd1c1ae72baf
font_01_sfnt_off0000fccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCB 11276 bytes
SHA-256: 37d1bed7cd4c052ede6a5dc00cb75d8400ac56b53b43e8cd6dced389ef97ed5b
font_02_sfnt_off000122b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B0 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3