Malicious PDF — malware analysis report

Static analysis result for SHA-256 7be0dcb3614bee5d…

MALICIOUS

PDF

80.5 KB Created: 2021-03-22 02:44:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d166f8b434eb4738dd9276f316d83d8 SHA-1: 5182c23d5869448efc25e1201320f9030453a2a7 SHA-256: 7be0dcb3614bee5df8c8313822de351f5dbac94e37d2f8f7c87f7d62447ccd82
126 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. The presence of a URL related to 'eset mobile security license key free' suggests a phishing or scam attempt. ClamAV and ML classifiers strongly indicate maliciousness, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/wix?keyword=eset+mobile+security+license+key+free
    • http://reawont.online/gseb_textbook_std_11_12_commerce2dn3h.pdf
    • https://cdn.sqhk.co/duvetezoje/gUibjix/kotuzanufoliwej.pdf
    • http://nurokojo.mypressonline.com/loweze.pdf
    • http://tlgfree.xyz/biblia_reina_valera_nuevo_testamentokmw3e.pdf
    • http://botavubapisod.mywebcommunity.org/21850008766.pdf
    • https://dagigofeno.weebly.com/uploads/1/3/4/8/134887245/zojudefelini.pdf
    • http://pejazadajenatew.getenjoyment.net/arduino_coding_basics.pdf
    • https://lopufofogepuxal.weebly.com/uploads/1/3/4/6/134695200/4729858.pdf
    • https://cdn.sqhk.co/baxikomo/U4ggKWy/43709373764.pdf
    • http://kalowodopole.mygamesonline.org/mukugejazinemegifoxibiram.pdf
    • https://xijegasafofid.weebly.com/uploads/1/3/0/8/130815381/8b8c161d20.pdf
    • http://magnifioco.site/hp_officejet_pro_6835_printer_driver_downloadedt91.pdf
    • https://pimazapodozem.weebly.com/uploads/1/3/2/8/132814260/7051080.pdf
    • http://fafesixokegigi.getenjoyment.net/intro_to_python_programming.pdf
    • https://cdn.sqhk.co/fekoguwiwu/FjbN3hd/snake_vs_block_skins_list.pdf
    • http://arthromedro.xyz/malamepaludiliwovumuxr7l02.pdf
    • http://jabilevij.mypressonline.com/gelapedovisilox.pdf
    • https://cdn.sqhk.co/latusetime/hK1hihc/60864515332.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://bad3f395-1638-4667-b349-d6f934eeab49.filesusr.com/ugd/ed2d23_5f7548ba78684490af23579f1c9d43f1.pdf?index=true
    • http://wegamaluperetuj.atwebpages.com/3341771159.pdf
    • https://042e50b4-45d0-4577-915a-c14d43ab21ad.filesusr.com/ugd/18f527_940e8d4f8be540d6a41bd931884ff32e.pdf?index=true
    • http://kagijido.myartsonline.com/english_language_gcse_revision_guide.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcd9.bin
f12b9f3043d630a9ccf9c61fbc56e2df799165f31eb344d6bd69b92c957981bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD9 5080 bytes
font_01_sfnt_off00010e21.bin
9d501a26f526e3c40f2c1bc5f4aec3a4b6e94bb69d4c359f15c99dc589f473cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E21 11176 bytes

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