Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e68c6832ce354c6…

MALICIOUS

PDF

91.8 KB Created: 2021-02-16 23:43:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: f3eaae27850782c82785a676c464b047 SHA-1: 23a3ab8d7c0e69bdb95c59c0c990899660dcee8f SHA-256: 2e68c6832ce354c64372b7194065e71726ce65deb1c09e1af76fdf447398ccbe
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The embedded URL `https://seumenha.ru/wix?keyword=monster+legends+unlimited+gems+apk+2020` suggests a lure related to game cheats, while other links point to various topics, potentially for SEO manipulation or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://seumenha.ru/wix?keyword=monster+legends+unlimited+gems+apk+2020 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4378852/normal_5ff9a6e280f4f.pdfIn PDF document text
    • https://cdn.sqhk.co/zalivelo/j6GXCjc/atlantic_fleet_winning_battle_of_the_atlantic.pdfIn PDF document text
    • https://cdn.sqhk.co/dapumexader/jfgLoDy/human_endogenous_retroviruses_definition_biology.pdfIn PDF document text
    • https://cdn.sqhk.co/samanugutu/8SEvuhb/retro_arcade_machine_ms_pac_man.pdfIn PDF document text
    • https://kedumapeba.weebly.com/uploads/1/3/4/5/134593926/5330961.pdfIn PDF document text
    • https://ruwefenoref.weebly.com/uploads/1/3/0/7/130739117/vofowijimirazevo.pdfIn PDF document text
    • https://cdn.sqhk.co/medujebukoma/dpcPhap/40951371829.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428069/normal_5ffd402e23599.pdfIn PDF document text
    • https://cdn.sqhk.co/rugugojeba/0ij1bkn/spiral_fracture_5th_metatarsal_foot.pdfIn PDF document text
    • https://nokajadum.weebly.com/uploads/1/3/4/8/134887388/sabixuvolasot_pubuvorasuba_misuk.pdfIn PDF document text
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/9578174.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415768/normal_5ff856ca728b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491671/normal_5ff9a434e06c5.pdfIn PDF document text
    • https://cdn.sqhk.co/gabisolovima/6i7zDgg/rangers_of_oblivion_wiki_espanol.pdfIn PDF document text
    • https://nezogifoxo.weebly.com/uploads/1/3/1/6/131637357/a1734f59b8768a0.pdfIn PDF document text
    • https://cdn.sqhk.co/kewudomavave/TRu40Fn/duzujevikafukigakefuva.pdfIn PDF document text
    • https://cdn.sqhk.co/tavanaru/h2p5hcu/wallpaper_hd_iphone_7_red.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/jasojofodawivifex.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/ejemplos_de_actos_juridicos_formales_solemnes.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/wowimel.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/85527710701.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/2019_annual_calendar_template_australia.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_off0000f7dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DD 3092 bytes
SHA-256: 5458808cd9538621fafb0df5684a1d4a8c29ac5d931903f117965f6f8b643a64
font_01_sfnt_off000102c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C8 5620 bytes
SHA-256: 18cf0770960b701be8d1d5a3cc69f23a903e2c0051f71b684471e16746c2ac45
font_02_sfnt_off000115d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D0 2140 bytes
SHA-256: fa98316bad0ee393e4244be63b1d230beb4724cf855be96ad4f2c87a5b302ae2
font_03_sfnt_off00011faa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FAA 10348 bytes
SHA-256: 2ea227bf589cac37c9a735591743f15033729b4d3a2c345ac5358c11b6a69d5b
font_04_sfnt_off00014319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14319 16212 bytes
SHA-256: 1ee85d9b2018e03fb2545c7bdfd18aab3c4871b38cdebbbadf2790f840b53384
font_05_sfnt_off00015862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15862 1736 bytes
SHA-256: 74be5bc4d46f64e5c506ae1006f7022dc98ebf960e37c7bf417c2027ca73106d

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