Malicious PDF — malware analysis report

Static analysis result for SHA-256 d57544e4729ba00a…

MALICIOUS

PDF

96.2 KB Created: 2021-03-18 05:32:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 464e70275b2df053d269cfe5e8b51b6d SHA-1: eb9fdefe25e868ac631ad994980ae7e9bb1738da SHA-256: d57544e4729ba00a6f6306be7611e5876b72483732ad3679183ec54cb5924861
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links pointing to various PDF files hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The presence of multiple external URIs and the nature of the link farm indicate an attempt to distribute further content or manipulate search engine results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://jacksth.ru/award?keyword=les+accents+le%25C3%25A7on+pdf PDF link annotation
    • http://miiliioner.xyz/electric_pallet_truck_for_hireib2lh.pdfIn PDF document text
    • http://tiktokfrance.fun/agatha_christie_morte_na_mesopotmia7hzwe.pdfIn PDF document text
    • https://cdn.sqhk.co/jisaside/k8ids1t/46244272679.pdfIn PDF document text
    • https://cdn.sqhk.co/nozujeraguje/iChagid/muwolirerukasotuda.pdfIn PDF document text
    • https://cdn.sqhk.co/datolabevev/jjjizDL/rope_master_3d.pdfIn PDF document text
    • https://puxibaso.weebly.com/uploads/1/3/0/9/130968956/poxez_xubutuve_zugovutu_gebakaduwejokuj.pdfIn PDF document text
    • https://cdn.sqhk.co/sezabaxo/bThEigh/500_word_challenge_2020_login.pdfIn PDF document text
    • http://vizionsmc.net/dls_mod_unlimited_create_playerzzz1q.pdfIn PDF document text
    • https://wezifujizofuji.weebly.com/uploads/1/3/4/9/134904593/750267.pdfIn PDF document text
    • https://lerofiputa.weebly.com/uploads/1/3/4/3/134367001/f0d99a1f60.pdfIn PDF document text
    • http://komarovskii.xyz/white_rodgers_thermostat_reset_programhkofz.pdfIn PDF document text
    • http://igonlinesupport.com/why_choose_python_programming_language6nr6a.pdfIn PDF document text
    • https://cdn.sqhk.co/wememiguw/hgeo5gi/adobe_after_effects_fire_plugins_free.pdfIn PDF document text
    • http://gtmedis.com/what_are_some_confused_wordst7ye6.pdfIn PDF document text
    • https://dikurowewo.weebly.com/uploads/1/3/4/8/134893632/limagi.pdfIn PDF document text
    • https://pamigewome.weebly.com/uploads/1/3/4/6/134631685/supun.pdfIn PDF document text
    • https://vinetiwufo.weebly.com/uploads/1/3/5/3/135305890/favevofenub.pdfIn PDF document text
    • https://fibumexil.weebly.com/uploads/1/3/1/0/131070733/majegofiwi.pdfIn PDF document text
    • http://natur-green.fun/how_to_draw_anime_nose_step_by_step_for_beginnersjegtb.pdfIn PDF document text
    • https://xawavefite.weebly.com/uploads/1/3/4/6/134667803/9204221.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vitelitubovuluj/contouring_guide_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/7453566258.pdfIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/44330643765.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/98534357860.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA32 4916 bytes
SHA-256: adac7a7a7eec9f42cfda742d7978dda0e5f299b9c0231017b087db51c0622d06
font_01_sfnt_off00010aab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAB 6636 bytes
SHA-256: 34f3124bb5318182d4db7eab168d5ddbe0e0f99cf41d1e6e7cfcf69d32510d5f
font_02_sfnt_off00012149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12149 14000 bytes
SHA-256: 5ab790db2568efe0a7398b690a266214dcc2bf261b8987110c8ad0532e53bcf9
font_03_sfnt_off00014c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C98 16328 bytes
SHA-256: 853c74ca7a16698ef8d4467d9ae5677b3fb1b5885dbb0b368ce59ebd91b9e44d
font_04_sfnt_off00016253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16253 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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