Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ded558d504abf12…

MALICIOUS

PDF

83.1 KB Created: 2021-02-20 18:59:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 09a158e460d6fac5b13ed4eb7b1184a1 SHA-1: ab413a90b2a557c68e78a65e3e4c1b1dbc7fa68a SHA-256: 7ded558d504abf1251292e2618e7d7f770d7bfb996c53235a9146e6850c813e2
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable domains or link farm services, indicating a malicious intent to redirect users. The ClamAV detection and ML classifier strongly suggest this is a phishing or malicious PDF. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of techniques used to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://seumenha.ru/strik?utm_term=catching+fire+movie+online+free PDF link annotation
    • https://cdn.sqhk.co/pugudanirav/gcavia2/watch_nba_ncaa_basketball_live_stream_free_mobile.pdfIn PDF document text
    • https://cdn.sqhk.co/xakelafu/5hi8z0P/46412099821.pdfIn PDF document text
    • http://fresh-ita.fun/virtual_table_tennis_hackjl0am.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455898/normal_601ecd9438af9.pdfIn PDF document text
    • http://myshoes.moscow/549939189463t6hj.pdfIn PDF document text
    • https://zunurevupuvofas.weebly.com/uploads/1/3/1/4/131438471/1476418.pdfIn PDF document text
    • http://youralteragoods.com/plants_vs_zombies_download_full_version_free_apkjc1uw.pdfIn PDF document text
    • https://wijodemarivupi.weebly.com/uploads/1/3/4/8/134861972/5900e67c13c6922.pdfIn PDF document text
    • https://cdn.sqhk.co/marixefe/4uNicmb/islands_of_nyne_battle_royale_ps4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478132/normal_600539f3929e4.pdfIn PDF document text
    • https://cdn.sqhk.co/padixemugex/iFjihjg/sovawevarufutavaguga.pdfIn PDF document text
    • https://webuwoterin.weebly.com/uploads/1/3/4/5/134589655/wigetelulex_nikorev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366381/normal_5fc69180f02e4.pdfIn PDF document text
    • https://vogovolakufa.weebly.com/uploads/1/3/4/8/134874318/4e3d9c6f7.pdfIn PDF document text
    • https://fafenerukore.weebly.com/uploads/1/3/1/3/131398145/jetela-tewajevatoduz.pdfIn PDF document text
    • https://cdn.sqhk.co/leruwexikud/HVgdztg/english_song_love_story_mp3_download.pdfIn PDF document text
    • https://cdn.sqhk.co/miwizawi/ehi5gh3/67288110615.pdfIn PDF document text
    • https://luzuredero.weebly.com/uploads/1/3/4/0/134016924/sixagotupisiboro.pdfIn PDF document text
    • https://cdn.sqhk.co/kizafizutuw/icgcifL/mosotiwedefidokot.pdfIn PDF document text
    • http://artelamp.store/tony_robbins_awaken_the_giant_withinpadgs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482880/normal_602264cfe714f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00010823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10823 5084 bytes
SHA-256: a8300b2021de31c6694906732ad4ae63de0139ad0db8ee0c5fab9e563d39bb29
font_01_sfnt_off0001194d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1194D 11108 bytes
SHA-256: dccb567ec960012d7a90ea93ee56d4cf01108600b6ffedf690c659f1a3e98698