Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcaceb7cc0416320…

MALICIOUS

PDF

107.8 KB Created: 2021-07-15 20:44:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5279be23df3c06d3b7bb9b9f6b4c40a8 SHA-1: b2246ad683f08a62906d8ad6c327f7adb7d28713 SHA-256: bcaceb7cc0416320ddc1d821fe5f5957a134af2dadcaa9c3f38313b554610258
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm with numerous URLs pointing to compromised WordPress sites, likely intended to redirect users to phishing pages or download further malware. The presence of external URIs and link farms suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9813

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://catamma.ru/uplcv?utm_term=meaning+of+precisly
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/lk8eqeogll4c79chl039771jem/45253289562.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/2h7mhgvsjqvrhvcs67t6ukv8r4/83045269581.pdf
    • http://devison-matras.com/upload/file/nemorajexebafan.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bde52beb15542e051fee91107e34816a/dokapakidikagojefiwexuvig.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609769bc68d10---nuvopefaliremug.pdf
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b6c67c40b7c---98910275177.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c784ef1323---piladedoxisizugefusir.pdf
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160aadd65abdd9---ruvalebomelili.pdf
    • https://aedwea.com/upload/foto/97364926012.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a75d10ba5db---luwawomiroxufatumiv.pdf
    • https://alnahamgroup.com/userfiles/file/xubapumufaxavizekapil.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/bd99a24d3085747d3b465786a4f6d98d/meful.pdf
    • http://geoodwierty.pl/files/file/biwimizepasusuzikusosufo.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b4d593897---gipibomodakogixuko.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160824a9275093---73873036097.pdf
    • http://df-2.de/images/daten/file/31855968830.pdf
    • http://www.mkkdigital.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160a2895b6d9e8---jugasosedejasorasivis.pdf
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607053c6d891b---dijexededapubuvijujuf.pdf
    • http://tuvanluatdanang.com/upload/ck/files/34344871836.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/e375df8b24489ba4ee29be80392ac965/8980394692.pdf
    • http://hillcresthigh1971.com/clients/9/9f/9fbf9047a6869172a982db6f42f05a9a/File/zefomegusanoxizotopebim.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a12260cbec3---gafepigosomuvutugijaf.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off000152ad.bin
83014c280ade8bf08d169bf4c1dd857a4b55de00210b21c2f10216d74af2278a
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x152AD 29484 bytes
font_00_sfnt_off0000f2fc.bin
69483a7a674c611225893a0f408e7bcfb620b797610f02b13cf6fa8e9f961cc3
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FC 2400 bytes
font_01_sfnt_off0000fd72.bin
aad74ba7c079481fb2154db855a3ddba3806142e3b2bd5e29b4d0e5453f04ae3
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD72 10664 bytes
font_02_sfnt_off000115f8.bin
037aaa501b64e9a961c77cf5e3f09294cc70dbf060e272a35b61b096aef1827c
pdf-font-stream PDF embedded font (sfnt) at offset 0x115F8 24596 bytes
font_04_sfnt_off000187df.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x187DF 16792 bytes