Malicious PDF — malware analysis report

Static analysis result for SHA-256 db8cc6d00cab0cc3…

MALICIOUS

PDF

97.9 KB Created: 2021-05-06 17:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3cfee786ad3672bb6a08a46ebf5ebe9f SHA-1: ff1118a038d43ab611fc8a5b55e71b2d576b9928 SHA-256: db8cc6d00cab0cc305da7f58b1c1882d236b0d36a26f27035b031c8ee528bd11
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The presence of numerous links pointing to compromised WordPress sites and disposable hosting suggests a phishing or malware distribution campaign. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/dada20d4ede549d0ebdec55c3da585ff/boxupakibadusa.pdf
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075384276fb1---tezakujiminexesibakenagov.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/5aobbqnipev0u4qkqm8b9b4n60/sixuxowexosidid.pdf
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/km1pkb6er4s4l595e7dp8f9lk5/12325452911.pdf
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/5e8060854ecd76ef463cab2501db8ec7/rajazaxununupajitalikime.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/e91a7db362d8d38a994709c08e2cf834/22894330090.pdf
    • http://albino-pitti.com/pub_img/file/4771669745.pdf
    • https://allcreaturesinc.com/files/files/jidaramoje.pdf
    • http://angelcabrera.com/FCKfiles/file/30324556227.pdf
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2d452c170---vodoxakamanevifobog.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/013dfa3ad456d8e83feaa5e2f18673fc/1439346800.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1608a422f078c2---jawesej.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609226d1bdfac---17239700611.pdf
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/2dea432804f0c9551e5033f7263e4b57/80428179177.pdf
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160923f2f23ea2---memeriwegunotabojunidefez.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca1d48a32e---pasexubexowovutese.pdf
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d0619fdc8---livoge.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=imci+guidelines+2016+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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013f8f.bin
c6dfda7fc9cf52e2947e60d37ee1b746f0ac4daa6ab7ebd18538b2f5d7d8f6d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13F8F 5588 bytes
font_01_sfnt_off00015293.bin
ee97e1e466a76e49eac8698822c9faad5c2476cad1faa349232066500a32416d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15293 12080 bytes

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