Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c6ccad47508e045…

MALICIOUS

PDF

76.0 KB Created: 2021-07-15 14:25:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 46bea2864aadf42edbd6675866729e2a SHA-1: f2f66b90951cb6bd7f0df076bf5ea72906c99ef1 SHA-256: 3c6ccad47508e04567eff6682f7a673ea290f1dd9c963289a4cb1fbc272bd68d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, indicated by a high number of external links, many pointing to compromised WordPress sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for redirection to malicious content or further phishing attempts. No scripts were extracted, but the extensive link farm points to a broad phishing 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://pistant.ru/uplcv?utm_term=800+baht+to+aud
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/08688122aa92ec2cf150457f72c96f15/demimeziwovezij.pdf
    • http://barcelonasixtytwo.com/userfiles/file/jizumujerakunew.pdf
    • http://eurekaelearning.com/upload/news/file/texegakavatez.pdf
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/4ecf6c817f07981f758d50e20e62afd5/guziguvutipipa.pdf
    • https://laughteronlineuniversity.com/images/upload/files/zoxutipujedumajaxep.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9dfeda14c---vapomunagafuxo.pdf
    • http://ash-graphy.com/userfiles/file/tonevojos.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/9571617ddda74f90333dcec3d49dc081/rifemigolesigewir.pdf
    • http://grandinspirations.com/clients/75274/File/70571399709.pdf
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/23fd8f08c943166e201ebe77a5903d94/dogode.pdf
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1f22c1224---mesixurofuno.pdf
    • http://szao-spb.ru/images/news/file/minezosivatedurijitekiji.pdf
    • http://sparkpro.lv/content/file/rusajosev.pdf
    • http://hnc2.com/userfiles/file/12098628476.pdf
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/c504c71877ddd7a9b61b6cb3922ce508/vidorokem.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e182065885---97073526074.pdf
    • https://alshamiltrading.com/alshamilfiles/file/gilukidenizinabatada.pdf
    • https://datawire.gr/files/files/xidawekawexibuv.pdf
    • http://samtekelektrik.com/files/duzakujiza.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/61d59d11643d71b889bfbffea24f54c1/dugozakakupijav.pdf
    • http://aceonlinementors.com/userfiles/file/95404620987.pdf
    • http://rogo-rotterdam.nl/files/2588212986.pdf
    • http://coffee33.ru/archive/file/tavijokopukeweve.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/c2a377c1df5179501f00e5c040144d8e/gotuted.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/429ac75fd57ea2a19ce47bf01224f009/dutojakifunana.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_off0000c83a.bin
9617dc249312bec56d19f7722e9c060c1915d5e7c178e64efc790d1076d50440
pdf-font-stream PDF embedded font (sfnt) at offset 0xC83A 16836 bytes
font_01_sfnt_off0000f3f5.bin
7c64867d1f7c94632d8231f698916188024c9f6afed16b450549da3dcd0a5fcb
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F5 10176 bytes
font_02_sfnt_off00010aca.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACA 16792 bytes