Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a11a4d5f037002…

MALICIOUS

PDF

91.1 KB Created: 2021-06-14 10:54:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c06bbb12f1a82e62a5dd4ce30da6780a SHA-1: 2c489210790b95b9bfb79b9a664ce4d0ba8821d5 SHA-256: d2a11a4d5f037002abeee3cada03fdf71abafa8e9615df1dbc9c6489631cca0c
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to compromised WordPress sites and disposable hosting, likely to distribute further malware. The presence of embedded URLs and the nature of the heuristics suggest an attempt to trick users into downloading malicious files, possibly disguised as legitimate software like an APK.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://garglob.ru/uplcv?utm_term=perfect+photo+background+changer+apk PDF link annotation
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/bkil4f7dho11hujh2gspj1p9u7/navowapoxixopibemuzoz.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/79c8489f36a2f64af83f9e1baf9fa3d9/kokozeminuta.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077500c02a5a---lerutimu.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6734b73b5d---nakurujadevewupirigemi.pdfIn PDF document text
    • http://evevoyance.fr/adh/.-/file/bopokaweja.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/k7b36lb73fhk8lthtd86vqfh42/99707725454.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5ed1c0ed98---11670599629.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/e64d782a9180666f2ef298f7b0c20835/87913441838.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/4h2gmq7rvl5a6m97dbvtvjaul6/wumunodifenagapazu.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8884ab55a---75392788007.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608d89c7cc590---lutasubaxijidoxonamawar.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/afd043fa94b0f483763f877eb088749b/96392224141.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-05-28/images/files/58208645744.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/e176cd791eab24b451d43184a0793169/padisusalutokes.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/vcujriin4o14011kqaqd36b4s9/jaxenejisok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eda1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA1 5412 bytes
SHA-256: 1b36ff95952e93eaea2dd7658c0fd03b9c4ee26105feacffeead61462ac6eb7c
font_01_sfnt_off00010000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10000 4140 bytes
SHA-256: 2a2f73c0ee504ae8509221dab9a50e72e6c400a18e3952d3eee660ba18a0c3b1
font_02_sfnt_off00010d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1F 4764 bytes
SHA-256: 3f6b0cc4d28f2574f742519f760ec940d0008519c6bb782e7abfffde69319d40
font_03_sfnt_off00011ec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC5 11240 bytes
SHA-256: b5ab05a5c48808a5c089ec510a93a30047a86230eed087ea5948943851d84504
font_04_sfnt_off00014578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14578 17248 bytes
SHA-256: da836ad0c17f9b315a39157fe9abeb0bfc7ff49cb090dc1b5e5d80f4a47fffd4

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