Malicious PDF — malware analysis report

Static analysis result for SHA-256 38eb603ff893859e…

MALICIOUS

PDF

71.3 KB Created: 2021-02-24 07:11:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 74f090281fd6b7b7be3a6c155a968abf SHA-1: cb6de7e29a5e2a1749ad974114681dc0a18aa50b SHA-256: 38eb603ff893859efdbc8544f6917a41f5fc567f400a675d289f4643f026e69c
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, indicative of SEO poisoning or a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wb?keyword=chicago%20manual%20of%20style%2016th%20edition%20in%20text%20citation PDF link annotation
    • http://opendouche.xyz/basic_physics_conceptsh4t3k.pdfIn PDF document text
    • https://cdn.sqhk.co/pofifarim/dhdggqg/88119742748.pdfIn PDF document text
    • https://cdn.sqhk.co/samumosoxivi/hJhiq7d/craftsman_air_compressor.pdfIn PDF document text
    • http://fastnoutservice.ru/across_the_stars_piano_sheet_music_freeoh774.pdfIn PDF document text
    • https://cdn.sqhk.co/wepunajexiju/g8ieijG/bewegata.pdfIn PDF document text
    • https://sefubokadizafa.weebly.com/uploads/1/3/4/8/134880044/6bd2b5fc7b.pdfIn PDF document text
    • http://mebutef.22web.org/codewars_python_answer.pdfIn PDF document text
    • http://dfahsdfgjsfg.online/moto_bike_attack_race_apk6i5ox.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/aghibFv/69469810234.pdfIn PDF document text
    • http://pocki.top/what_is_in_mcdonalds_breakfast_sausageuajjf.pdfIn PDF document text
    • https://cdn.sqhk.co/sovanoniwuva/Ljd0Xja/god_ringtone_download_2019_tamil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mapamazimibodu.epizy.com/vic_ballarat_tv_guide.pdfIn PDF document text
    • http://nexopuvesoreben.epizy.com/world_press_photo_en_mexico_2014.pdfIn PDF document text
    • http://nokarox.rf.gd/22075781850.pdfIn PDF document text
    • http://nitovotiroxe.epizy.com/depeche_mode_enjoy_the_silence_piano_sheet.pdfIn PDF document text
    • http://bezepegu.epizy.com/8951440063.pdfIn PDF document text
    • http://lomuwobutuwadim.rf.gd/88546699358.pdfIn PDF document text
    • http://vixabediwudofi.epizy.com/is_pennywise_mentioned_in_dark_tower.pdfIn PDF document text
    • http://lefumes.rf.gd/ccs_university_exam_form.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_off0000d8e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E2 5620 bytes
SHA-256: ca4afb3032539a85c56a44e9e1f80a9fceadcbaf44d4165a0550690fedf7fa51
font_01_sfnt_off0000ebf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF7 10588 bytes
SHA-256: b03d1cf2d7c39801750d4a8e5003314b21f9986ebdb69fee4ef577051b7831bb

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