Malicious PDF — malware analysis report

Static analysis result for SHA-256 d670517aef25e263…

MALICIOUS

PDF

90.4 KB Created: 2021-07-01 13:17:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fe34f2070c7b5168e7f96bdb2df0877f SHA-1: 2d81747370481796b74d7a91aaf1a21f8a8d93c0 SHA-256: d670517aef25e263fc82a02f9c1668a46931cd2cca6e822f063fddc8b28cba47
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm, indicating a likely phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond what the heuristics reveal.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://garglob.ru/uplcv?utm_term=your+questions+and+saibaba+answers
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607604717e097---sonalurevaminuviro.pdf
    • https://menlopark.com/wysiwygfiles/file/dubumisu.pdf
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/871357515609839dcec94d.pdf
    • https://zlatartopalovic.rs//files/goloranitikalovibugokomed.pdf
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/7fc05374ab92e47081d520799947e247/21681233974.pdf
    • https://elegune.net/files/galeria/files/xulogerej.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fdda34a11b---35104675707.pdf
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/9fd25dc212d285d486f5864156560483/raxir.pdf
    • http://specimport.by/files/files/biliraxo.pdf
    • http://wahluenfty.com/userfiles/79904061935.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072edc33b4f9---43768644018.pdf
    • http://wf515345.tw/CKEdit/upload/files/fewigetesenobonemunimiso.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/0uvsr4pjhc2c0pgdu88oia128a/83278736130.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160c066b7172ba---47787321992.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16087ddc149c71---mirufezarepije.pdf
    • http://botosani.ro/img/uploads/file/pemenodugelotitifivalaz.pdf
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/ruvosuxogibatotiw.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/3370eabdaf6f1bc1997a28e873721fa4/46466106900.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160741b342a958---getakeleru.pdf
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/me7nt54umjmk0fov747h654vjr/sikobalofon.pdf
    • http://bawaconstructions.com/editorData/file/bemokebol.pdf
    • http://stylekd.ru/files/73560458419.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b93ed68d8---favubirukalemipivogebizu.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c2361c3ba84---moneratuderos.pdf
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/a84dbc35264a7b76cd0a9eded0b7be47/vesedi.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd6a.bin
9a37248f4c3a207229c85f27060d334ea66f2e3ec5224185e43b1e81dcd14cf5
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6A 17604 bytes
font_01_sfnt_off00012ba5.bin
09f9ae4f8081f2e6b6d3c5776d6e73770bd154cd0da7ee3114e34661fce710c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA5 10652 bytes
font_02_sfnt_off00014406.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14406 16792 bytes