Malicious PDF — malware analysis report

Static analysis result for SHA-256 9012f8319b573c94…

MALICIOUS

PDF

90.0 KB Created: 2021-07-03 22:03:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 849bdbb2897ba7d1d0a315c4830347f4 SHA-1: b27f09da667e60779b1704960c9d39f0d86eb09f SHA-256: 9012f8319b573c94800494f44caa8e3112aa083c669faef35a00510bc1d712ba
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely serves to redirect the user or download further malicious content, contributing to a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096f46f666bd---48113953137.pdf
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/jj8a4u51sj1avgbs0t934smafa/resunalasope.pdf
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/0ba09f2b30ab2539dd5f69dccea5e363/16539289878.pdf
    • http://navigator-33.ru/media/file/63033025180.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/tb2h6krsgppdg1tpovhjsun9sj/5774450681.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089769d43fba---29222697498.pdf
    • http://amoy-art.com/Upload/file/geginuzikegozelinevodidov.pdf
    • http://langmoon.jp/js/upload/files/38683532672.pdf
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160b54bdfdcae5---siwimexaf.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/abfa4a8a42f9c95f50e850d8ae831722/77196464266.pdf
    • http://banghetretunhien.com/media/ftp/file/22887724343.pdf
    • http://tipsclubcr.com/campannas/file/kowowijiludomijifetawudo.pdf
    • https://anmoul.com/userfiles/file/pituwiv.pdf
    • https://elektrona.cz/files/file/39813735802.pdf
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/dc7fe67258694d40a444729e7c31f853/tojaluden.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16076bca69623a---japozanajarabavepotaxopib.pdf
    • http://cbgnfinance.com/userfiles/file/95998048787.pdf
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087d3a40b50a---kesodig.pdf
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/s1tv7eqb8oplmhtm4j7qc8d8j7/fanuvezewum.pdf
    • http://marinapogon.pl/upload/file/pitolugijobenovofak.pdf
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/a7acd021d03a86ef9c7bd086e943e7f5/wulajopapimesuluzunaji.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a87f90b1965---wuwekuzu.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e2e5eea07---teloterazurimirupen.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d987421f4---jikifazajugub.pdf
    • http://tgtech-auto.com/userfiles/file/99643728482.pdf
    • http://kubabus.cz/novy-web/upload/file/48316020734.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=selina+biology+class+8+textbook+pdf+free+download
    • 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_off0000fa92.bin
e2624ff89bcaf8dcca6d03f6add9ba75c88c4120f4e6164c5d1f405cd4cc6a18		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA92 16432 bytes
font_01_sfnt_off000124b6.bin
389eed320953c2c9f8631b192e96b54943f44f431abf5715d5cccd7fec936494		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124B6 11612 bytes
font_02_sfnt_off00014017.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14017 16792 bytes

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