Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab014e706a4be310…

MALICIOUS

PDF

68.7 KB Created: 2021-09-26 08:53:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0279f6a126a8a771ec6beff7998567a7 SHA-1: d3294fc8de865eded7e478b8414dce10d2b24e55 SHA-256: ab014e706a4be310dc460edbf8d9c93de5d3ea660217fb11646d287bc188b101
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous embedded URLs, many of which point to disposable hosting and are structured as link farms, suggesting a phishing or malware distribution campaign. The ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • 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 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://huntic.ru/uplcv?utm_term=mpt4u+latest+version+apk PDF link annotation
    • http://aaaexpressheating.com/userfiles/file/62993382383.pdfIn PDF document text
    • http://svadbavmoskve.com/content/xuploadimages/file/45129685643.pdfIn PDF document text
    • http://gomientrung.vn/uploads/image/files/15282346962.pdfIn PDF document text
    • http://umffz21.ru/admin/ckfinder/userfiles/files/jodomominakeregoxizomij.pdfIn PDF document text
    • https://www.hosotte.com/ckfinder/userfiles/files/97719282033.pdfIn PDF document text
    • http://tecs4.com/intranet/ckfinder/userfiles/files/bemamevededuziron.pdfIn PDF document text
    • http://ceramicaartisticamarsalese.it/userfiles/files/nosaxokitabazizupalidexe.pdfIn PDF document text
    • https://history.tlshaa.org.tw/ckfinder/userfiles/files/88335855398.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/26086fd5dc6c290b3d40eb967ae15e1f/degewiduninugotolinusij.pdfIn PDF document text
    • http://nocleginaplus.pl/uploads/userfiles/files/woginugemeko.pdfIn PDF document text
    • http://only-svet.ru/upload/files/finulutivamunejogugeb.pdfIn PDF document text
    • http://1yunnan.com/ckfinder/userfiles/files/musepixadanurezovoneb.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/15770619511.pdfIn PDF document text
    • http://luligang.com/ckfinder/userfiles/files/bijerijijabuvi.pdfIn PDF document text
    • http://biznesfishki.ru/files/userfiles/files/muvepozekasofapakuli.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/816ac8d5806ece7cafa4c012e2728827/91284103279.pdfIn PDF document text
    • http://vtdsbinhthuan.vn/public/uploads/userfiles/file/giwadilimozuvipen.pdfIn PDF document text
    • https://ewt.cz/res/file/55960733398.pdfIn PDF document text
    • https://asoriofrio.org/ckfinder/userfiles/files/kusabofomelegukajudab.pdfIn PDF document text
    • http://pro-customer.de/userfiles/file/15971457771.pdfIn PDF document text
    • http://ruresept.ru/files/file/jerenufibibetaj.pdfIn PDF document text
    • https://grandhotelushba.com/userfiles/file/59695446894.pdfIn PDF document text
    • https://aventura-agence.lu/userfiles/files/dakisofovumilitevelitu.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE1E 15356 bytes
SHA-256: e82a5aa0eae2dba9134cbb0e20f7399ab11993ec44b1d3d0f32f6206f66b0859
font_01_sfnt_off0000d4e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ecfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFA 10572 bytes
SHA-256: ce4ccaed942c0002bd307c196666230544a0741f321a12495e956b667ab3d830