Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ba18a85237fde95…

MALICIOUS

PDF

65.6 KB Created: 2021-02-15 23:59:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 1945ac292baa9df389ce9ebe708ec0f8 SHA-1: cce4e31604a74bd65186ec0e8e27b5ecd353e5ef SHA-256: 1ba18a85237fde95d09d2926a90795ca20426e6114a49e48b305c0fa2c9aa639
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and an ML classifier, including ClamAV detecting it as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, contains keywords related to book collections, likely a lure to direct users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/strik?utm_term=roald+dahl+collection+books PDF link annotation
    • https://cdn.sqhk.co/devisofage/iggyfge/61481303507.pdfIn PDF document text
    • https://cdn.sqhk.co/kawonidoza/gijjqI9/online_shopping_uk_food.pdfIn PDF document text
    • https://cdn.sqhk.co/kufomopinu/cFoidhh/devil_smithy_epic_idle_merge_dragons.pdfIn PDF document text
    • https://telidububiz.weebly.com/uploads/1/3/1/4/131452987/lujolemewugagisejixu.pdfIn PDF document text
    • https://rukufutuseju.weebly.com/uploads/1/3/4/7/134748195/lejorujizuxo_didivufodabami_neguxorerat_kiwolojepize.pdfIn PDF document text
    • https://cdn.sqhk.co/wesifarajaru/ii9Akuk/draw_it_too_fortnite_characters.pdfIn PDF document text
    • https://cdn.sqhk.co/kisunika/jbihgeT/stupid_zombies_3_apk_download.pdfIn PDF document text
    • https://jitugitux.weebly.com/uploads/1/3/0/7/130740190/7781618.pdfIn PDF document text
    • https://linazoforup.weebly.com/uploads/1/3/0/8/130814758/cf8f10c4d027ed.pdfIn PDF document text
    • https://relitemora.weebly.com/uploads/1/3/4/3/134352419/5472155.pdfIn PDF document text
    • https://buzufurabobozu.weebly.com/uploads/1/3/5/3/135304208/42e67c23f9.pdfIn PDF document text
    • https://cdn.sqhk.co/sobexofap/Ojdgjhc/80845525581.pdfIn PDF document text
    • https://cdn.sqhk.co/pojizurigos/D9ifhe6/lofatikotamagogekomowape.pdfIn PDF document text
    • https://cdn.sqhk.co/gomurabog/gGMjjrB/rottweiler_puppy_wallpaper_4k.pdfIn PDF document text
    • https://mirivibi.weebly.com/uploads/1/3/4/2/134234555/pupifixixut_kavujaboduj_nitufaf.pdfIn PDF document text
    • https://cdn.sqhk.co/bujiwamovul/NwifIoZ/46419394168.pdfIn PDF document text
    • https://cdn.sqhk.co/mibajufaneja/U0lV4gf/telemedicine_applications_in_case_of_covid_19.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/eDjdwlX/687756475.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://raseloxezonavo.epizy.com/antivirus_android_gratuito_2019.pdfIn PDF document text
    • http://wevosana.rf.gd/paxafelurekamizogofozo.pdfIn PDF document text
    • http://zivuvosiz.epizy.com/9998836485.pdfIn PDF document text
    • http://bividit.rf.gd/kixulegagevuxetajinexogir.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_off0000c27a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC27A 5144 bytes
SHA-256: 3ed3d992be9a2a579fb649b212a60ed1888aae791f167c6d5f758559e8e3dafd
font_01_sfnt_off0000d3f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F1 10460 bytes
SHA-256: 05e5f7efed7eb9b45c268b98655fd3ed43ad9896e766f3870647433a90009fd2

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