Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad90270d16de4b51…

MALICIOUS

PDF

77.5 KB Created: 2021-04-10 14:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e929e31d892b0130e04ed5f1089ad46f SHA-1: d5e90847ca8abc0455bfb4a8874924120c87c8ba SHA-256: ad90270d16de4b51931bc09c723f3497ff7a71783fc54948316e3fccee041715
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model also indicated maliciousness. The document body, though heavily obfuscated, appears to be a lure related to 'Quran recitation with urdu translation android app', directing users to external URLs. The presence of numerous links, many on disposable hosting, suggests a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/strik?utm_term=quran+recitation+with+urdu+translation+android+app PDF link annotation
    • http://rotixumuzu.22web.org/definicion_de_organizacion_segun_autores_2015.pdfIn PDF document text
    • https://bisetegu.weebly.com/uploads/1/3/4/5/134528498/1319686.pdfIn PDF document text
    • http://pirawamajakemiv.22web.org/fmea_template_for_software.pdfIn PDF document text
    • https://roxejozojone.weebly.com/uploads/1/3/0/9/130969259/b770c559169cf2.pdfIn PDF document text
    • https://pepodefaposuv.weebly.com/uploads/1/3/5/9/135992330/3595732.pdfIn PDF document text
    • http://kilewigi.iblogger.org/kobinijasizi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pigolo/lolozizotobon.pdfIn PDF document text
    • http://rovafitazilom.epizy.com/xijadolojufo.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/cooler_master_cm_storm_trooper_se.pdfIn PDF document text
    • https://7ed1f289-57d1-4e2a-9ee4-b64e0eb498cf.filesusr.com/ugd/13dc0c_652b00c91d7c42bcbbcaea3d21632bd9.pdf?index=trueIn PDF document text
    • http://zefefudu.rf.gd/88790996259.pdfIn PDF document text
    • http://wubipuvupiwar.epizy.com/cantoral_liturgico_san_pablo.pdfIn PDF document text
    • http://dedafozun.rf.gd/focus_on_grammar_1_vk.pdfIn PDF document text
    • https://f45985d3-969e-4a4b-a16b-f92b7c881388.filesusr.com/ugd/20da2d_29eec2c31a1f411a838fb89d2e66f272.pdf?index=trueIn PDF document text
    • http://lunewexaxepo.epizy.com/alopecia_androgentica_femenina.pdfIn PDF document text
    • http://bigisokuwes.epizy.com/riesgo_tecnologico_financiero.pdfIn PDF document text
    • https://1c8fadd7-09eb-4d2b-9d42-8e747ba5ce52.filesusr.com/ugd/60625b_ec951cad82e74b0981a2a0a0d1d4ab39.pdf?index=trueIn PDF document text
    • http://zoloraliri.epizy.com/wenadugokugavogika.pdfIn PDF document text
    • http://levuturobawanag.epizy.com/catechesis_in_our_time.pdfIn PDF document text
    • https://13a7c488-548c-4b48-b567-d2b0b9a3e1de.filesusr.com/ugd/85d67f_aba7d15e463a4a54a8775124cd7beb97.pdf?index=trueIn 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_off0000f174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF174 5312 bytes
SHA-256: 50699594c3df800ef490394a4c41842a602dc1db72277cf686093414acf37b23
font_01_sfnt_off00010389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10389 10860 bytes
SHA-256: a8f7da076a33176de4c8158cb6d13af3579c5bb2ab7a3dac2e100a7f51eebc0b

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