Malicious PDF — malware analysis report

Static analysis result for SHA-256 d643bd04c3c51b92…

MALICIOUS

PDF

71.0 KB Created: 2021-04-07 05:44:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c769769e22e8e06f9cb12093098ca09 SHA-1: 8232606812484d2cc407d30d1d13b03af41f63a7 SHA-256: d643bd04c3c51b92255858530bd0be0a9d788e1ab753249817d5d3695c0fbebd
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with the primary suspicious URL being https://maypoin.ru/wix?keyword=town+hall+6+war+base+copy+link. This suggests the document's purpose is to redirect users to potentially malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/wix?keyword=town+hall+6+war+base+copy+link
    • https://xigokujote.weebly.com/uploads/1/3/4/6/134649591/b9d7e4ecdbb.pdf
    • https://cdn.sqhk.co/sixepatexup/fDiaI9x/spinosaurus_skeleton_drawing.pdf
    • https://fapurexetekuwud.weebly.com/uploads/1/3/4/5/134508670/2820336.pdf
    • https://static.s123-cdn-static.com/uploads/4490929/normal_5fee84d249df2.pdf
    • https://tekudijasefemo.weebly.com/uploads/1/3/2/7/132740256/b25d3d39247.pdf
    • https://fodakapi.weebly.com/uploads/1/3/1/6/131637942/rejijixoz_badodamopakavop_kitilere.pdf
    • https://static.s123-cdn-static.com/uploads/4388427/normal_5ff714d026a8f.pdf
    • https://static.s123-cdn-static.com/uploads/4367631/normal_5ff6a4f1da438.pdf
    • https://static.s123-cdn-static.com/uploads/4454672/normal_5ffaa8e58d008.pdf
    • https://cdn.sqhk.co/lagidexetin/hczhjKy/konubeko.pdf
    • https://vemubofopelo.weebly.com/uploads/1/3/0/7/130776521/3168230.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xeruxaxer/astigmatism_aberration.pdf
    • https://s3.amazonaws.com/memexelu/donny_and_marie_talk_show_episode_guide.pdf
    • https://206c1dc7-391c-4b20-ac64-b63c97020fd4.filesusr.com/ugd/87773f_9376da21c2af4463879c29e9e729fe6c.pdf?index=true
    • https://1682489e-d94b-4f22-b6a6-c8ecb623ca2e.filesusr.com/ugd/5f226e_67ab52fc6a1c402bb71dcec119cf2aab.pdf?index=true
    • https://s3.amazonaws.com/dadupawo/nibeguzixamepijora.pdf
    • https://s3.amazonaws.com/telasebisu/vb.net_interview_questions_free_download.pdf
    • https://f7690f66-1871-4559-97e0-239dee5b15da.filesusr.com/ugd/d2cc1f_21f0717d6fb6422faca8e26b00589cea.pdf?index=true
    • https://s3.amazonaws.com/subopukomanaw/82293241184.pdf
    • https://s3.amazonaws.com/nitizobuv/la_familia_de_pascual_duarte_pelicula_descargar_gratis.pdf
    • https://f5d5bca3-0ffd-41e3-a77d-3d805a1e43e5.filesusr.com/ugd/4e23ca_4c1ae750c1644ddf9e645d4110bf1fa5.pdf?index=true
    • https://s3.amazonaws.com/dowavelaxam/gakidiseze.pdf
    • https://854397d5-242e-4836-9f1e-4d22a5541959.filesusr.com/ugd/88a329_f416780ba86b4d31ae6816bbf54b06cc.pdf?index=true
    • https://s3.amazonaws.com/sugosubexez/fiwimefigadidirigurawo.pdf
    • https://s3.amazonaws.com/juvetaso/14369861066.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_off0000d6e1.bin
605324599886af683190cf32f1444366434e5502356080acab9c9fd7b557307b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E1 5524 bytes
font_01_sfnt_off0000e9b0.bin
d3bad2ba0794b760d03e2975b4797814394073910bd73a7153a0642f8e0a724b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B0 10960 bytes

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