Malicious PDF — malware analysis report

Static analysis result for SHA-256 2da4f8873608ff8e…

MALICIOUS

PDF

86.0 KB Created: 2021-06-03 03:59:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 78d39c82d3dfac4c4b98894eb65d5b14 SHA-1: 46b45935ecb4fb5acfe19f55e40db436f7e0d182 SHA-256: 2da4f8873608ff8e147532000e2145c8635f64e7b02f7d22c0b64ad3144ef742
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. It contains a link farm with numerous external URLs, many of which are hosted on disposable domains, suggesting an attempt to distribute malicious content or phish users. The primary lure appears to be related to 'monster legends hack apk unlimited everything', indicating a social engineering tactic to entice downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://krisoc.ru/pbw?utm_term=monster+legends+hack+apk+unlimited+everything PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367645/normal_5fe6331411646.pdfIn PDF document text
    • https://xumipapabof.weebly.com/uploads/1/3/4/6/134609146/dijixirorizi-xemuxarar-levajiz-zivirukewalinir.pdfIn PDF document text
    • https://jutineriru.weebly.com/uploads/1/3/4/8/134866815/pipijurixofuvukeju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381759/normal_5fff19049a2f7.pdfIn PDF document text
    • https://jumalevejuza.weebly.com/uploads/1/3/4/6/134690248/foxivenebijizitipob.pdfIn PDF document text
    • https://ruzovaberup.weebly.com/uploads/1/3/4/6/134651658/2a5db.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426682/normal_5ff005e92b197.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367940/normal_602f62fb3648c.pdfIn PDF document text
    • https://zamigemunizi.weebly.com/uploads/1/3/4/3/134347724/sowetavulu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417315/normal_600d56f45a374.pdfIn PDF document text
    • https://nopeludaseji.weebly.com/uploads/1/3/3/9/133986928/bawixisusotagi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409998/normal_606ac43d32bb1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pupowivala.pbworks.com/f/descargar_pokemon_mundo_misterioso_exploradores_del_cielo_espaol_mega.pdfIn PDF document text
    • http://lagawiwefe.pbworks.com/f/99746572443.pdfIn PDF document text
    • http://pugaxigodaka.pbworks.com/w/file/fetch/144463566/89876684275.pdfIn PDF document text
    • http://lagawiwefe.pbworks.com/f/vepax.pdfIn PDF document text
    • http://naxenuve.pbworks.com/f/xifuritokasukavufavoxu.pdfIn PDF document text
    • http://vadibun.pbworks.com/w/file/fetch/144442377/81500644656.pdfIn PDF document text
    • http://wisarazed.pbworks.com/w/file/fetch/144459348/38302223922.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC3 3092 bytes
SHA-256: 16fe9e081df28270fad6d0a91d4f0c241425f6aa1eb6ed33110a82fb07a3249d
font_01_sfnt_off0000e9ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AE 5716 bytes
SHA-256: 4eaa5b60f0662aecbbd9cdcb5e32a4133ccbb854c9502f206c1c5c476d8b0aa6
font_02_sfnt_off0000fd0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0C 2140 bytes
SHA-256: 289854c0292170102eeea8cd8d9fa039b7e5adf06f71653ea533c14c4e2d2c34
font_03_sfnt_off000106e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E7 10852 bytes
SHA-256: 55b77cbd14f77bd76263b750f576e3291e3f7ba206235caabf5025b8621cfbe6
font_04_sfnt_off00012bcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BCF 16212 bytes
SHA-256: bcc960100e1b82b52ac003ded46c4da84a12d6e4d658d06f9551137e90be9242
font_05_sfnt_off00014118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14118 1736 bytes
SHA-256: f27f1dab863be407bc80ce69f069aaa000ada345c50a5fba1d6b915b5f603bb6

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