Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ee0ba4452a39af3…

MALICIOUS

PDF

92.9 KB Created: 2021-02-18 04:01:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e45b7e0a37dc85c41fd3ef716b65ab6 SHA-1: d63be8a40c1e52f685bd1a400ba85fb42ab7f15e SHA-256: 2ee0ba4452a39af3f57c217f0ed054b209a2604318186f31f1d3551a8a3a86bd
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a phishing or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing malware. While no scripts were explicitly extracted, the PDF structure and embedded URIs 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://leonvi.ru/wix?keyword=guitar+hero+world+tour+song+list
    • https://kexanitafax.weebly.com/uploads/1/3/0/8/130813084/vifaso.pdf
    • https://bajomunimiru.weebly.com/uploads/1/3/1/0/131070213/136150.pdf
    • https://cdn.sqhk.co/rabuzopat/bjRjhZC/zedd_funny_lyrics.pdf
    • https://jolosusopafo.weebly.com/uploads/1/3/4/0/134097145/6334300.pdf
    • https://wofofubuw.weebly.com/uploads/1/3/2/7/132710679/xopademomoxovubal.pdf
    • https://cdn.sqhk.co/lagolipumepi/yXjaif8/merge_racing_car_mod.pdf
    • http://domavera.ru/manual_recliner_armchairlq2fg.pdf
    • http://sibuvre.com/wimuwunetuxevagfp9v.pdf
    • https://safubijob.weebly.com/uploads/1/3/2/6/132682970/1011518.pdf
    • http://yozi.store/26080310434507q6.pdf
    • https://cdn.sqhk.co/pixazizaze/pkidgcQ/kawadijutonabogoroki.pdf
    • https://cdn.sqhk.co/zuxosutuku/ikifgjW/incineration_clean_air_act.pdf
    • https://fogunovavak.weebly.com/uploads/1/3/2/6/132681822/zajuromuperepomij.pdf
    • https://navuvosukogeguf.weebly.com/uploads/1/3/1/4/131454151/1613344.pdf
    • http://amsidgi.xyz/crazy_rich_asians_streaming_vostfr62qo3.pdf
    • http://trastqort.online/hvordan_man_laver_churros_med_pillsbusass.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jurelofi.epizy.com/lethargic_sleep_crossword_answer.pdf
    • http://kagilabitivibe.epizy.com/acm_icpc_cheat_sheet_python.pdf
    • http://siwavubixuvavil.rf.gd/jopisagab.pdf
    • http://mofetase.rf.gd/computers_in_human_behavior_author_guidelines.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_off0001240f.bin
2002d336d986063917f2870f1f813f414be05a24cfb41d47ca8570248ca346d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x1240F 5212 bytes
font_01_sfnt_off000135d1.bin
7963be3be1b3f56b7f97870abb94f01a9c968e5aa9bc8e47d27ce952478fc81d
pdf-font-stream PDF embedded font (sfnt) at offset 0x135D1 15660 bytes