Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e1d821d8386283e…

MALICIOUS

PDF

89.6 KB Created: 2021-08-02 18:43:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d6082af637c71ce0431ac4f0318faa59 SHA-1: 567250718804c1ac9355cbb28e88f3e3e2f18b74 SHA-256: 2e1d821d8386283eeb91b020d24f20945f14f5173206441e368af24eec54ccb0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The presence of numerous external links, many pointing to WordPress upload directories, suggests an attempt to host or distribute further malicious content. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://soba05.org/wp-content/plugins/super-forms/uploads/php/files/4e769f63c53336ff9eece59ede166502/87376462282.pdf
    • https://silatur.com/js/ckfinder/userfiles/files/jugesamezojuxositi.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086d8c6503f8---11678058228.pdf
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b86f25ad866---bujubemo.pdf
    • https://akita-inu.lv/www/files/files/pipetowewinuxibuvifaf.pdf
    • https://vibangnhadat.com/uploads/files/44097095765.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/j5dqcn3snln3rchqug7t8m8dsc/6283209408.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/u4kcho2vp4r73bjmuvsjkrtnk3/94213411957.pdf
    • http://lycee-elm.org/userfiles/file/xekidi.pdf
    • http://thessalonikiflights.com/files/files/58670646252.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/340857703a7943abd35d460e5148840c/41804101408.pdf
    • https://marcuspietrek.de/MARCUS/files/file/dutapuwusodu.pdf
    • http://bi-acaovo.com/upload/files/28386134143.pdf
    • http://danangsculpture.com/uploads/image/files/ralifenetemadalepubaxamej.pdf
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a84fe79d2---wopudisevenazes.pdf
    • http://alwaysfavorentertainment.com/clients/879371/File/78112599701.pdf
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/5ee15qfrcfduviic2ngoprnnk7/35837928759.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606c9e42cc3ec---11524653707.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf197573cf---bijewijewu.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1e831e8534---40285038477.pdf
    • http://ttworld.hu/uploads/content_files/files/38785956103.pdf
    • http://augustaelectricalwork.com/editorData/file/15851311697.pdf
    • https://inncredel.com/uploads/fupaweza.pdf
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3a4773cdc9---nevapawotetufarobaxixif.pdf
    • http://gibisch.biz/files/files/teditalod.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=que+pena+tu+boda
    • 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_off0000fb78.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB78 16792 bytes
font_01_sfnt_off0001138f.bin
e86e5fa1b99437474b554176940b698e0d744c149585d929e29732974e623800
pdf-font-stream PDF embedded font (sfnt) at offset 0x1138F 10280 bytes
font_02_sfnt_off00012aa1.bin
e5d0e0ee3ee4b8faee4f29a17b015466343d5518f10c3a666c1a2a2643b1194c
pdf-font-stream PDF embedded font (sfnt) at offset 0x12AA1 18368 bytes