Malicious PDF — malware analysis report

Static analysis result for SHA-256 29464d5bac250e8b…

MALICIOUS

PDF

89.0 KB Created: 2021-07-06 23:29:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d74842a2ac5c13245746b0857ed80da2 SHA-1: 935709bce945665eeb5e28962878934e5972cdb7 SHA-256: 29464d5bac250e8bf026168bd72d6a722344c518fece75d5894dedf0c26dcfe9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of links pointing to compromised WordPress sites, indicating it functions as a link farm. These links likely lead to phishing pages or serve as a distribution point for further malware. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://philabc.ru/uplcv?utm_term=hindu+names+for+girls+starting+with+n
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160d46fa4e273f---4282249733.pdf
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160abb2777b3bd---roxadowasurinepajuxu.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/4f8d39953dd4b291f461162d97ccfb6f/liloguvexawoxex.pdf
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/c827edf7a9dee5a02b2b4586b2fd0881/rixonelisulitilotu.pdf
    • http://derma-dts.de/files/file/91997667875.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16099afcba0b25---86274523899.pdf
    • http://capmar.eu/userfiles/file/xewigesanavawiza.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609d268fba2d0---nekezebuzinabikadajel.pdf
    • http://phayaotechno.com/UserFiles/File/51309008391.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/deb53af55b485d75146c198095180b23/lafabamamalo.pdf
    • https://lasanisports.com/files/26731190100.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ebae8a78b---75744403179.pdf
    • http://phunhai.net/upload/files/mekoliverimukasukaleme.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a069e967c7---58276397510.pdf
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608201c150afc---tatepujidufizuxonileni.pdf
    • http://rapabzenec.cz/obrazky/files/7284661797.pdf
    • https://oxfordjsr.com/userfiles/file/83462504069.pdf
    • https://abeess.com/userfiles/file/perugiduwafapopolovukewo.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3a76d8a6d---63987665742.pdf
    • http://worldnaturalfood.com/image/upload/File/lodurebepexapupugemuja.pdf
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c740144eec---rosejixilivukifenikud.pdf
    • https://harryfok.com/ckfinder/userfiles/files/35116116130.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160711382b64c7---tuzolagiboxifi.pdf
    • https://tatsolarlight.com/uploads/files/tonejamiga.pdf
    • https://bbgpiti.com/userfiles/files/vabowokava.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_off0000f7d5.bin
12469375d145b178bc14d5c4140a9c370aa2640439980c04a26162551464d088
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D5 17344 bytes
font_01_sfnt_off00012516.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12516 16792 bytes
font_02_sfnt_off00013d2d.bin
c5e5c760a97afb34441dc44860c4a50445f81d718a8d67b7cf56b0d2948a2478
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D2D 10976 bytes