Malicious PDF — malware analysis report

Static analysis result for SHA-256 e801fa91eb9cb2c6…

MALICIOUS

PDF

84.4 KB Created: 2021-08-20 06:12:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c9ecefe8da39d257f96ca4a0f9fed056 SHA-1: ca479f3c0abd31cfd7ea2e67aa615ec60996a8ee SHA-256: e801fa91eb9cb2c6bd6d7335932c144eb00c694d4b26867460abffa3afa24ba5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress uploads and disposable domains, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the structure and URL patterns are consistent with malicious PDFs designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://lotteppta.com/beta/assets/file/95883197428.pdf
    • http://faurerom.com/userfiles/file/pojonatani.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/7888d914cb984e54cc2dd108814c7672/tibedegake.pdf
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/r2ene1sq8m3m5uk4gm19sahq3i/8442513015.pdf
    • http://logtech.cz/foto/Image/file/wulolesisetevuzikute.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a21f18d1bbe---zetokupirirojafewa.pdf
    • https://rumahbaruku.com/contents//files/71846077120.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611eeff1de138---mekelezapovepari.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f71821379---risiwexesitoluliviju.pdf
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/01c39d5c59ddfcfc5b0db0cfde7e8d2d/19626469560.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/16086023947194---13026613286.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/161186aa90272c---tuvixevizepop.pdf
    • http://seattleteriyaki3.com/uploads/files/pomusamavizerapafopokubur.pdf
    • http://mikailang.net/userfiles/file/20210501164504_402413048.pdf
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/6u90ssb7kq0792j42rppvaonj2/xikufixejukuluwapa.pdf
    • http://eiak.org/upload/editor/files/rebofobazesumaketujo.pdf
    • http://jnafarms.com/clients/864068/File/lewijuwesotora.pdf
    • http://myphamlulanjina.com/upload/files/puwikiz.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/96f78550d67b1ad99a2e2709ce79fb4f/koboki.pdf
    • http://dajuicebarus.com/uploads/files/fubudupumurexumoz.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb14c305a63---92859020758.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bbba8338f1d---suvonixe.pdf
    • http://emotionpicturesfestival.gr/userfiles/file/safoxogarir.pdf
    • http://randoquad72.fr/userfiles/file/20856473636.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae03b060a1---nejifazuruzozituro.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=if+i+can+help+somebody+sheet+music+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_off0000e593.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE593 16792 bytes
font_01_sfnt_off0000fdaa.bin
2ea621b1d5f863c7f8d616de0a4d4d23d2cc66579ba38b3cd728e61e044bf6cf
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAA 11092 bytes
font_02_sfnt_off0001171c.bin
e72c220a29c1cf2489b00c3c00cd48fa368d2ec43b86a55058f6d44c667b7a24
pdf-font-stream PDF embedded font (sfnt) at offset 0x1171C 16720 bytes