Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1c1a823f79e2200…

MALICIOUS

PDF

84.8 KB Created: 2021-03-28 21:28:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 922d92d2262196853fb1f447296e7eeb SHA-1: 11d80ee5b39f3a9a1596bd365f6ffc0f5ef1dec5 SHA-256: d1c1a823f79e2200ee75333d4b038081106f22f94c636d2a8526f9d55d908e51
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, including one to 'leonvi.ru' which appears to be part of a link farm designed to obscure the true destination. The document body, though heavily obfuscated, contains text related to 'Pengertian internet menurut para ahli pdf', suggesting a lure to disguise the malicious intent. No scripts were extracted, but the presence of multiple external URIs indicates an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://leonvi.ru/award?keyword=pengertian+internet+menurut+para+ahli+pdf
    • http://nitiwopororotef.mypressonline.com/math_syllabus.pdf
    • http://woziwowariv.sportsontheweb.net/los_feminismos_ante_el_neoliberalismo.pdf
    • http://rakajipof.22web.org/20528437530.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://vowenop.epizy.com/vixolokajufizomeri.pdf
    • https://03f57db0-fbcf-46ec-8713-21b5992b8512.filesusr.com/ugd/455f95_6a78e7d222f64203bc5aee30f9a073df.pdf?index=true
    • http://vilumepidiwego.myartsonline.com/1974424101.pdf
    • https://d1b33a7b-cde1-45d4-bc15-d4d3b6236ac5.filesusr.com/ugd/1d64af_99bdf93edcee45709fd979ec93539c36.pdf?index=true
    • https://s3.amazonaws.com/midizaxopazeji/how_does_the_i_pilot_trolling_motor_work.pdf
    • https://uploads.strikinglycdn.com/files/d643f719-10dc-4e9e-a6f8-2e2cb7484848/kubalenedoxikesojanefe.pdf
    • https://82656f1f-dd0f-4426-89ca-c5688288f975.filesusr.com/ugd/56de54_93b99ce0863b454fb2780be3d1276007.pdf?index=true
    • https://s3.amazonaws.com/luxelula/duzajugo.pdf
    • http://ruriwujuvuwa.epizy.com/40175132306.pdf
    • https://6cb1c90e-07cf-4522-b85d-4edd8abc33c8.filesusr.com/ugd/0c41e7_95971e4924b746d2a7dd3e86772ef023.pdf?index=true
    • http://gejopap.rf.gd/kutudufasuzuwevuzujodoz.pdf
    • https://uploads.strikinglycdn.com/files/c63864b2-2628-4a61-a74a-bc9b454f9ac9/what_are_green_bonds_used_for.pdf
    • https://s3.amazonaws.com/nufidibodudulad/9071680697.pdf
    • http://fadevosozegula.epizy.com/mokivasixoxeka.pdf
    • https://uploads.strikinglycdn.com/files/af05fa71-4cbc-457d-9def-916eec318bf3/historia_natural_de_la_enfermedad_del_covid_19.pdf
    • https://fec450ea-b80f-4746-b851-35139cc02de5.filesusr.com/ugd/53a83b_3c677bd01fe24d79a7fe629ae1b7d2ce.pdf?index=true
    • 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_off00010286.bin
4acb53be4393d3a94c7346ad17f048c28250e6b2d6f0903279598383dfa3f03e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10286 5048 bytes
font_01_sfnt_off00011378.bin
8dcf8612f1c52b7e88aa3982e886891118b366e283803048b6e83bb455f7f4c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11378 10624 bytes
font_02_sfnt_off000137d7.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x137D7 4324 bytes

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