Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae99ab06cd6b6236…

MALICIOUS

PDF

103.7 KB Created: 2021-03-17 19:41:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e26d607b9a2c2bee04ee244b9a2f8d0 SHA-1: 790e7bd7e1c425d63a3b5689b9fd400cc9e79f8f SHA-256: ae99ab06cd6b62360b2127e854db2708541ce7565aace08172ac25896e0f99c4
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs pointing to potentially malicious domains, and the document body, though obfuscated, suggests a lure related to a datasheet. The presence of external URIs and link farm heuristics further supports a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://soxebez.ru/123?utm_term=loctite+5188+datasheet
    • http://xagakojitogiva.getenjoyment.net/libros_para_aprender_japones_desde_cero_gratis.pdf
    • http://vemelaribox.getenjoyment.net/xamezupebepasotigud.pdf
    • https://cdn-cms.f-static.net/uploads/4374522/normal_603b62b8430a7.pdf
    • http://tozaworewinox.mywebcommunity.org/96075078741.pdf
    • http://gadetebes.sportsontheweb.net/rime_of_ancient_mariner_albatross_theme.pdf
    • https://cdn.sqhk.co/rolaravez/iJMX15M/romotojejilesuvowa.pdf
    • http://gamowenugeg.sportsontheweb.net/how_do_i_connect_my_logitech_bluetooth_mouse_to_my_macbook_air.pdf
    • https://cdn.sqhk.co/rogenujudita/iagmxie/74016527718.pdf
    • https://cdn.sqhk.co/mesafovojifo/hhhjcib/ice_crusher_can_am_defender_heater_install.pdf
    • http://xoxuvajes.mywebcommunity.org/how_to_use_hans_3ds.pdf
    • https://cdn.sqhk.co/runolisor/jhjcjdS/23457666514.pdf
    • https://cdn-cms.f-static.net/uploads/4385437/normal_604189974192e.pdf
    • http://ritegifufefut.scienceontheweb.net/acl_reconstruction_rehabilitation.pdf
    • https://cdn-cms.f-static.net/uploads/4470402/normal_604a4a9a8be3c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://8a89c5bc-485b-4808-980c-66c60e8d9908.filesusr.com/ugd/834936_92546d54364f4612a6a233a4ab889ed7.pdf?index=true
    • https://s3.amazonaws.com/besafefaf/25211539282.pdf
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_128b07f2ce4147eb9470910952a95985.pdf?index=true
    • http://jitawidavez.atwebpages.com/what_is_building_mental_stamina.pdf
    • https://s3.amazonaws.com/kiguteperilodu/ghost_recon_breakpoint_open_beta_cross_platform.pdf
    • http://bugenerefajujus.atwebpages.com/17536010791.pdf
    • https://s3.amazonaws.com/zibenoroduzuw/seleruwewedijulefipux.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015084.bin
7e28f26553e172d923cf79a9bd7dcd7b3dafee50f7806c98234dbabcb4f89bc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15084 5212 bytes
font_01_sfnt_off0001624a.bin
2a8214435d7140cf48adeecc6add302ff1a0061cf260c79517a0fdea04dfe814		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1624A 16844 bytes

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