Malicious PDF — malware analysis report

Static analysis result for SHA-256 d09459c8bdc777ba…

MALICIOUS

PDF

76.0 KB Created: 2021-04-26 16:36:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7077c8b16824fac8faf806e52b5c1ee0 SHA-1: 5ee3f02127e97b168e2115633fc02805f32c59af SHA-256: d09459c8bdc777ba047b164ea62868e047ee5acdfe30b4afa57d27a7932d4798
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and employing UTM parameters, indicative of a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/strik?utm_term=diary+of+a+wimpy+kid+the+meltdown+pdf+archive
    • https://xokiguju.weebly.com/uploads/1/3/4/6/134679394/xemala.pdf
    • https://wobosiwax.weebly.com/uploads/1/3/1/6/131607505/dojurifokakorifasi.pdf
    • https://werotibumef.weebly.com/uploads/1/3/4/9/134900185/faladiteditajokifomu.pdf
    • http://rivafigikiwax.medianewsonline.com/motigupufoxidumakilixaw.pdf
    • http://xufamorazogubov.sportsontheweb.net/mathematical_reasoning_writing_and_proof.pdf
    • https://xofajusas.weebly.com/uploads/1/3/1/0/131069744/6987872.pdf
    • http://madoxorijegobe.sportsontheweb.net/zozidosas.pdf
    • http://pigalimiru.medianewsonline.com/antenna_theory_and_design_solution_manual.pdf
    • https://cdn-cms.f-static.net/uploads/4485946/normal_605bea8e77205.pdf
    • http://ketosimple.online/277270629982rs4h.pdf
    • http://yewes.space/a_different_mirror_a_history_of_multicultural_america_downloadayosr.pdf
    • http://ketadiets.site/sulopusixorepofurepubogr1dd.pdf
    • https://static.s123-cdn-static.com/uploads/4392651/normal_5fe5370c7b398.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/jaxesabi/buildbox_for_windows_7.pdf
    • https://uploads.strikinglycdn.com/files/debd9d73-9ebb-4b3a-afbe-e463980767b6/pukigavafudunatewuzi.pdf
    • https://s3.amazonaws.com/jemisajoda/suwewuvopemika.pdf
    • https://uploads.strikinglycdn.com/files/953997e2-e5a4-447c-b6f7-8aa07a302507/11945811861.pdf
    • https://s3.amazonaws.com/fomaralunex/korg_sv1_vs_sv2.pdf
    • http://titugol.atwebpages.com/39502509991.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df11.bin
01e0a95a96db724383d585aeea37e3bd4d254a5b9b52c1e961088f1b485338fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF11 5320 bytes
font_01_sfnt_off0000f127.bin
26ab5c20666335451443cfe10f4864ff256c7c8aa882b4d1a15b8be3d24faa3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF127 10276 bytes
font_02_sfnt_off00011475.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11475 4324 bytes

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