Malicious PDF — malware analysis report

Static analysis result for SHA-256 420711515f542a44…

MALICIOUS

PDF

166.2 KB Created: 2021-01-12 08:42:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbfbb2e21eb715b02626ca1591496440 SHA-1: e71f0d4f88d2fad68b511d75e5a4387270d2959e SHA-256: 420711515f542a44ceda2ae902b0d59babeebcc7c7f45268aca398ecefc13fab
184 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, with at least one identified as a redirector to malicious infrastructure. The presence of these links suggests the primary goal is to direct users to external sites, likely for phishing or to download further malware. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9664

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?utm_term=hk+onyx+studio+manual
    • https://site-1168029.mozfiles.com/files/1168029/the_cw_channel_number.pdf
    • https://xexasatokotubeg.weebly.com/uploads/1/3/4/3/134354060/2845439.pdf
    • https://site-1171584.mozfiles.com/files/1171584/sudora.pdf
    • https://cdn.sqhk.co/gepeduvo/Z0halyu/choice_of_kung_fu_apk.pdf
    • https://site-1171718.mozfiles.com/files/1171718/sobumututozobowe.pdf
    • https://tabuxeniki.weebly.com/uploads/1/3/2/6/132682737/zenudifudejexepelifu.pdf
    • https://site-1178214.mozfiles.com/files/1178214/bluff_definition_world_geography.pdf
    • https://cdn.sqhk.co/wixexozesila/gjbjiRN/82387941732.pdf
    • https://roboxojepuz.weebly.com/uploads/1/3/4/2/134235986/zuweposasi_sewiduka_wakuvugadaleg.pdf
    • https://diwowure.weebly.com/uploads/1/3/4/5/134592565/relofamimuborag_xibomaj.pdf
    • https://site-1217437.mozfiles.com/files/1217437/who_moved_my_cheese_book_study_questions.pdf
    • https://luwovizebezew.weebly.com/uploads/1/3/4/4/134482442/tozosoralisoriw.pdf
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/tunitulo.pdf
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/rebademujudo.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL
    • http://www.gnu.org/licenses/gpl.html

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_009_off00025bd9.bin
68c13edb7ae47bb622d87ad42c221fd5d7e49c7a34f77654266dcceda4da72d4		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x25BD9 25976 bytes
font_00_sfnt_off0001811e.bin
403f24ab6e252e2f2cef6a62763bf9a9605355e96797ca85458733e544bcfe0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1811E 32940 bytes
font_01_sfnt_off0001e6ed.bin
b90d2108136ac8bae53c7bfd85ccbe7d58672a489cf05862534aa67e23a96d77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E6ED 1712 bytes
font_02_sfnt_off0001ef37.bin
551acd8e33fef80de109b539b1b0d71450a06b9bc016b589ed13c68848d10756		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1EF37 5072 bytes
font_03_sfnt_off0002006a.bin
0613743209cdae15774a8887c8285ae8cb3ed5130d74e92b70d3cf39260c74e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2006A 2508 bytes
font_04_sfnt_off00020b0b.bin
f7b06404d53304e750607dfc9a2686068f8e4248fe229bcef40fe8dd13253aa0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20B0B 6296 bytes
font_05_sfnt_off00021b7d.bin
5cda45089d923071c3ecbc718f93bd38e06adf11da335ff49f6859cad3fac24d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x21B7D 22696 bytes

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