Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbe076ac9ef28fae…

MALICIOUS

PDF

83.5 KB Created: 2021-03-01 04:04:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a3c596d0da11f7c1991446d875fc375e SHA-1: 2c1e31db62c81b8b0cb06e92ad7f3ab24b9bb048 SHA-256: fbe076ac9ef28fae0785e11fef8354adb37470f5928b0cab65abb55cb25cc748
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, indicating it functions as a link farm. This is strongly suggestive of phishing or malware distribution, as confirmed by ClamAV and ML detection. The primary purpose appears to be directing users to potentially malicious external 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://druttle.ru/aws?utm_term=dell+precision+490+user+manual+pdf PDF link annotation
    • https://cdn.sqhk.co/tudusiki/h2jd3qT/clash_of_zombies_heroes_game_apk_download.pdfIn PDF document text
    • https://kenufipafalenar.weebly.com/uploads/1/3/4/6/134616414/rotizunaga-fusanolevoxur.pdfIn PDF document text
    • https://wafiludelo.weebly.com/uploads/1/3/1/4/131437380/4752813.pdfIn PDF document text
    • https://kazowajobizitat.weebly.com/uploads/1/3/0/7/130775795/rexolafaroz.pdfIn PDF document text
    • https://zunitaxipef.weebly.com/uploads/1/3/1/3/131398356/bosalufiwijofusibu.pdfIn PDF document text
    • http://sosiwawivijomo.scienceontheweb.net/un_centimetro_cuantos_milimetros_tiene.pdfIn PDF document text
    • http://helpcenterbusiness.xyz/halmos_measure_theory8osbj.pdfIn PDF document text
    • http://rigoditibalun.mywebcommunity.org/how_to_add_camera_to_summer_infant_monitor_wide_view_2.0.pdfIn PDF document text
    • https://cdn.sqhk.co/wabogoga/faAigig/cash_n_go.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/kidde_nighthawk_pi9000_manual.pdfIn PDF document text
    • http://kazimibi.getenjoyment.net/tiruwaven.pdfIn PDF document text
    • https://cdn.sqhk.co/tamoravuwera/hbdThiy/remix_omg_doll_song.pdfIn PDF document text
    • https://cdn.sqhk.co/kominepoli/x9iaShg/12563973866.pdfIn PDF document text
    • http://jujovobima.getenjoyment.net/tutorialspoint_asp.net_mvc_core.pdfIn PDF document text
    • https://telogedibosujo.weebly.com/uploads/1/3/1/4/131438044/407753ed52709d.pdfIn PDF document text
    • https://xopaluwejur.weebly.com/uploads/1/3/1/8/131857284/35b467240bcf250.pdfIn PDF document text
    • https://runumoviw.weebly.com/uploads/1/3/4/8/134854062/posesuka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://roveramo.atwebpages.com/46017570873.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_off0001090e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090E 5688 bytes
SHA-256: ddada22c833e32d7391875fddaf649fb682294023a9cadb7a53f074666d74993
font_01_sfnt_off00011c52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C52 10824 bytes
SHA-256: d70e2a890bb39306b1939065d166f490d670158f7be633de210ffa56f65b3c5c

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