Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceb57353ade96128…

MALICIOUS

PDF

87.8 KB Created: 2021-02-28 05:39:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 25a7f5dbd7f175489c5a7c30400ace4f SHA-1: 086d253dc48719ba46802544d42c31539a626dd4 SHA-256: ceb57353ade96128a9abaf9036dbf122e329531b07f460251a277f44e632db7e
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The embedded links likely serve to distribute further malicious content or lead users to phishing sites.

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://lozipotod.ru/wix?keyword=funny+words+that+begin+with+r PDF link annotation
    • https://cdn.sqhk.co/jisepozidis/tZidaI5/rocket_launcher_ark_code.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366374/normal_60210e85c0fa3.pdfIn PDF document text
    • http://lovelyhouse.online/87094416562o3him.pdfIn PDF document text
    • http://x-bionic.shop/belchior_coraao_selvagemustxw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465257/normal_5fce9af219705.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410207/normal_6035a859a1136.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/ajghahc/lutokimozefus.pdfIn PDF document text
    • https://lepitedow.weebly.com/uploads/1/3/4/8/134885181/6852160.pdfIn PDF document text
    • https://nonafinawajag.weebly.com/uploads/1/3/4/3/134331790/f33d0b65dea6cd8.pdfIn PDF document text
    • https://cdn.sqhk.co/ravusigi/iuPIjYS/dozovevabumuguw.pdfIn PDF document text
    • https://cdn.sqhk.co/wekajibex/ejdjhid/zong_free_internet_code_2019_list.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462376/normal_600db4450c277.pdfIn PDF document text
    • https://cdn.sqhk.co/bagojenul/GgfRhdv/house_building_games_on_steam.pdfIn PDF document text
    • https://cdn.sqhk.co/netimupoxojo/A9kjeF3/dipapefif.pdfIn PDF document text
    • https://moxitamun.weebly.com/uploads/1/3/4/0/134040854/453149.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lajoxugulip.epizy.com/how_to_make_distilled_rose_water_at_home.pdfIn PDF document text
    • http://fafovinipola.epizy.com/kobuvomadud.pdfIn PDF document text
    • http://bosefijov.epizy.com/how_to_use_manual_capsule_filling_machine.pdfIn PDF document text
    • http://danetuxu.rf.gd/poragivosezisanoke.pdfIn PDF document text
    • http://mexaguroduwora.epizy.com/64803371966.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_off00011c94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C94 5344 bytes
SHA-256: a1bcd053eb103517bb3274b6b2d13138ed2e3302f57d025ee76f16cd899e0af2
font_01_sfnt_off00012ed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED7 10416 bytes
SHA-256: fb87763f2141230cd5f24f39c88c051e1f3473463368ed04345492fd214ed575

Open this report in the interactive analyzer, or submit your own file for analysis.