Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8c827567e05e73b…

MALICIOUS

PDF

198.9 KB Created: 2021-03-25 05:35:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24775641f224b4806c8dd509854d5a3e SHA-1: 7e15efd1bc3a1f70d332601bcbeab59ba51f14ce SHA-256: d8c827567e05e73b967f1502296b34ec24ce1a4b539c0d3df0500b86c50fa803
136 Risk Score

Malware Insights

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

The sample was identified as malicious by a machine learning classifier and ClamAV, with heuristics indicating it is an advance-fee scam lure. The document body, though heavily obfuscated, suggests a theme related to 'logical fallacies' and contains metadata from wkhtmltopdf, indicating it was likely generated from web content. The presence of numerous external URLs, including one pointing to 'golowaki.ru/award', strongly suggests the document is designed to redirect users to malicious websites, likely to facilitate the advance-fee scam or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://golowaki.ru/award?keyword=all+logical+fallacies+pdf
    • https://cdn-cms.f-static.net/uploads/4422908/normal_5fd788354190f.pdf
    • http://mmmuuuue.space/602280925491im1o.pdf
    • http://lyudi23.ru/the_ransom_of_red_chief_summary_enotes06wwt.pdf
    • http://fobiwawosa.22web.org/52603916734.pdf
    • https://cdn-cms.f-static.net/uploads/4369646/normal_5fe6ccab4b444.pdf
    • https://derebadinexito.weebly.com/uploads/1/3/4/0/134012579/ruxilasol.pdf
    • http://fringigejy.site/ukulele_chords_girl_on_firekyit9.pdf
    • http://wspring.space/zirizohx0cp.pdf
    • https://static.s123-cdn-static.com/uploads/4422147/normal_5ff0c3c3cc0b8.pdf
    • http://korecos.ru/27250665030x0rtz.pdf
    • https://static.s123-cdn-static.com/uploads/4388183/normal_5ff6856b1742f.pdf
    • https://xunowarusaki.weebly.com/uploads/1/3/4/3/134371630/0cc18.pdf
    • http://servicesforsupport.com/qu_nmero_te_dices_el_nmero_de_eleqhijk.pdf
    • https://cdn-cms.f-static.net/uploads/4474985/normal_604b57ee914d4.pdf
    • http://bahis-sikayet.com/le_petit_prince_rose_pine4cgpy.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://0eb00d84-361a-45dc-b346-1af5c8eb785c.filesusr.com/ugd/d79848_9f07cf9f25d947d5a52b3522b38999b0.pdf?index=true
    • http://namutogenasokab.epizy.com/miporikazokaxig.pdf
    • https://3e3188f7-d9e9-48da-9af6-4e6760718ee0.filesusr.com/ugd/4f7562_8058cfc1cab440a192fd0235049c260e.pdf?index=true
    • http://xolefodaw.epizy.com/concordancias_de_la_biblia_reina_valera_1960.pdf
    • http://zefixufedinokas.epizy.com/biriyani_movie_ringtones.pdf
    • http://dajovomofoziso.rf.gd/30529554497.pdf
    • https://7fad2989-91b8-457c-89bc-9a0e7aeef19f.filesusr.com/ugd/b03ff3_e91a25dd89434b0a94c5cdde8d6ec211.pdf?index=true
    • https://2ffa788b-df2f-461f-b9c5-573bec542745.filesusr.com/ugd/374ce0_cc08ab1f51e04c59a16078649f22d65d.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002c718.bin
13ba9294886f24b5880b49907166b28db9f41eee533087f12f53438097eb71ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C718 4820 bytes
font_01_sfnt_off0002d787.bin
4349299b2bbcc64ff471c2ad8c0e7edac0169cd66fd48e2157f227305414cfe5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D787 12336 bytes
font_02_sfnt_off0002ffcf.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FFCF 4324 bytes

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