Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b023e5c91800d8d…

MALICIOUS

PDF

87.3 KB Created: 2021-07-01 00:11:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 36d7f68fa1eb3402ea50b7cce9ece9e0 SHA-1: 06ac92547406c06ae9b75721534b58d0357cead1 SHA-256: 2b023e5c91800d8de5049d243e6ea6a928bb66b7e543f53433176c0527f782a9
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or phishing pages. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or SEO manipulation campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/sgvhct68gkbeshplgaulset6sr/5739827997.pdf
    • https://advertisementnepal.com/ckfinder/userfiles/files/dovilunejatugepupumajuzal.pdf
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/13903042886.pdf
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/ecc6a0a8d3f6c32c9b66687eeabc12c2/43267629147.pdf
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/28a214844d7750527cc6916d7ef4ec85/5947676252.pdf
    • http://kozelskadm.ru/files/uploads/files/bojarifejatawumewuvumar.pdf
    • http://quickvideo.nl/userfiles/file/gafapexamoman.pdf
    • http://circuitvietnamcambodge.com/hinhanh/file/98684397763.pdf
    • http://vasvaripalmuzeum.hu/upload/file/54674024541.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/71dd8fe2c53f45ddcba95997379e30a7/63112792992.pdf
    • https://drsubhashawale.com/ckfinder/userfiles/files/todil.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1fe278bec---21385619878.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/c137e4b990b7f3a14b1a696e943cdb39/963791959.pdf
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608b926cd7534---99633589483.pdf
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/27cg00qdk81es8eiieog65da4m/85920067050.pdf
    • http://steakclubhn.com/campannas/file/fetewo.pdf
    • http://baobianhkhang.com/upload/files/72370892666.pdf
    • https://manualismedicina.hu/fileok/file/rotekigefotibenudum.pdf
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/98796600409.pdf
    • http://comlark.ru/userfiles/files/13739330471.pdf
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/a8b56c323048facd058174db3041d169/dopazini.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f42edbff8a---40531945305.pdf
    • http://verypool.cn/images/upload/File/javofefetovatokiv.pdf
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/212b94920e62878b5abc3fa3b1b36c88/26011353268.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=cottage+cheese+dips+for+chips
    • 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_off0000ee1a.bin
3493a79faf61030ce0cecd5b4c4259fe48537ea5aa13ea7ad15bdabc66aaef21
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1A 10780 bytes
font_01_sfnt_off000106ea.bin
ad91e073c4da3c47b46b6b7fd15f225d0b33d80f739305457a59bfc916dd338a
pdf-font-stream PDF embedded font (sfnt) at offset 0x106EA 18004 bytes
font_02_sfnt_off00013648.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13648 16792 bytes