Malicious PDF — malware analysis report

Static analysis result for SHA-256 038aec9cbb0b8b53…

MALICIOUS

PDF

74.7 KB Created: 2021-03-15 07:39:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ccc59a47eeab1d52f56759bd5712da0f SHA-1: 8ea2229857a45767ffb1ee94bbba1dff176abcfc SHA-256: 038aec9cbb0b8b534a58ef62d0054c52760189c35ff63a13d9a1b159a7b5e14f
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/wix?keyword=instruction+manual+for+sony+handycam+dcr-dvd108 PDF link annotation
    • https://cdn.sqhk.co/lisupixiwe/hbhgIjc/rupafiwes.pdfIn PDF document text
    • http://vatamulejuvovi.22web.org/sonoline_b_fetal_doppler_user_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/rizakumer/ipiegea/risotevufarizexajizejisi.pdfIn PDF document text
    • https://cdn.sqhk.co/jimavidozeze/jMijkif/best_tv_deals_cyber_monday_canada.pdfIn PDF document text
    • https://cdn.sqhk.co/madosodu/ghfjhKs/5027436492.pdfIn PDF document text
    • http://disukikobofug.22web.org/vipironazaribibeva.pdfIn PDF document text
    • http://winfreeiphone.xyz/beautiful_arabic_naat_audio6hjr7.pdfIn PDF document text
    • http://kpovli.ru/excel_beginner_to_advanced7rmd2.pdfIn PDF document text
    • http://wusokamojifel.scienceontheweb.net/when_did_pokemon_red_and_green_come_out.pdfIn PDF document text
    • http://kavelizopepi.mywebcommunity.org/gureza.pdfIn PDF document text
    • http://dawuxapi.iblogger.org/4104201845.pdfIn PDF document text
    • http://cmbmarketing.agency/zelda_twilight_princess_gamecube_iso_espaole4atq.pdfIn PDF document text
    • http://nanamojuvimujo.medianewsonline.com/what_are_positive_psychological_interventions.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://569e8712-2873-4b93-a654-ea71b6b809e3.filesusr.com/ugd/345929_4dee7ce651754ab080d0907090776a9a.pdf?index=trueIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_52e0971dba4c4862b4e681752482ad64.pdf?index=trueIn PDF document text
    • https://0a37a3d5-a0bf-4e77-8ff5-6127fd08aefa.filesusr.com/ugd/6046c9_7f9c87de0ba540c3a7abec9b54fc4dfb.pdf?index=trueIn PDF document text
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_94d662ca09924d09a6f02e7de22e82a5.pdf?index=trueIn PDF document text
    • http://dawifugoxumevej.rf.gd/thinking_in_java_book_free_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB0C 5780 bytes
SHA-256: e2faa0845462faa3450a1c222832807f3f0575d1610f3b6fed04eba31b70b805
font_01_sfnt_off0000de9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9D 4396 bytes
SHA-256: b5b8990b4e82e759d862f0b673429eec6996f764d130472294a31da699e12c42
font_02_sfnt_off0000efd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD1 13744 bytes
SHA-256: 1a45a0f555628c691ddf145949e698bec0dd9e84a620ed08e72dc8f3109fde66

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