Malicious PDF — malware analysis report

Static analysis result for SHA-256 08815bb9117bd3a1…

MALICIOUS

PDF

84.9 KB Created: 2021-06-10 20:32:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b5e90133e7f67392b44b8bdc11336620 SHA-1: cbcfc901554b44e69cc265d9ccfe58a50d62658a SHA-256: 08815bb9117bd3a127d4c3cf15322fd033085c0fa051924f91d5f7b00bebee3f
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised websites, many of which are hosted on WordPress installations and appear to be part of a link farm. The primary lure, 'Roblox mod for ios', is presented alongside technical metadata, suggesting a deceptive attempt to trick users into clicking the malicious links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://allytemp.ru/uplcv?utm_term=roblox+mod+for+ios PDF link annotation
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084817e30ebc---24667664260.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/3aec9a02de40d939f72483c38236ba06/5369401047.pdfIn PDF document text
    • https://szabobuszrendeles.hu/files/files/musebimopazuwoniladivu.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2c1c0e63d---62367449312.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/16087e0ee7cd3b---zotoj.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/467nhns9bv3ndl6lk5pnq1jk74/vaputofutubukejake.pdfIn PDF document text
    • https://llibreriaha.com/img/events/file/tamojunofelajapase.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/a2736b2501200d2ae2966aaa15858d23/36910869410.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/mf9sjqi4jjs49dmbpvrn4dp53o/suxafepemog.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/56207bb4df7b2de24b5bfce6bbd70e38/82923758970.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/d72daca1d11992372150b02a1a509f32/sizegumepevikimek.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baca5d8e541---pakigegevulubenevug.pdfIn PDF document text
    • http://box8websites.com/ckfinder/userfiles/files/japosojurarebawilonuga.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/duzuzatisomenabivoruse.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/wiviluvitafividazu.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0388d8abb---21935144370.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bba14ae54ec---82736474925.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB0 3792 bytes
SHA-256: 16b9c30a836273670302bfd87ea92d93169d26027b83489c708394a1f7ea642c
font_01_sfnt_off0000fa0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0B 5060 bytes
SHA-256: b921eac0e517bea920d574362c4aa816cfd6f4b1cc1406696856dfe8ba420d2e
font_02_sfnt_off00010b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B29 7120 bytes
SHA-256: 8a037b2554a4018729db7b57d3137e9774352c77eb6c9905380822e15d507b28
font_03_sfnt_off00011e65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E65 12520 bytes
SHA-256: 123e9d6d02a9e2b7fa69b87f9b1b0871a2f5036ff91b3f3cc04ad1ceebd78c3b

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