Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d634627dd36cb04…

MALICIOUS

PDF

86.2 KB Created: 2021-06-14 21:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 27867000d70b20666bee311755b9f44c SHA-1: 9df4549fa4e5f2618c828b05f30571b30c0885dd SHA-256: 5d634627dd36cb04fc36a78a49f941de0b7b0efd0538f5172021bea9d8846508
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://philabc.ru/pbw?utm_term=hum+sath+sath+hai+mp3+download PDF link annotation
    • https://pevetogebika.weebly.com/uploads/1/3/5/3/135335423/6317928.pdfIn PDF document text
    • https://lobekopaxukibo.weebly.com/uploads/1/3/1/4/131453735/5c3288246b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486994/normal_5fc8c7f7f024e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421960/normal_602453164b141.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493597/normal_606ae9ad79070.pdfIn PDF document text
    • https://volorizog.weebly.com/uploads/1/3/1/0/131070051/mopoxekizotuxiv_wusesenivulefi.pdfIn PDF document text
    • https://gebifulud.weebly.com/uploads/1/3/0/7/130775692/60fd1538be57.pdfIn PDF document text
    • https://rulodewarozuw.weebly.com/uploads/1/3/4/6/134678260/4658802.pdfIn PDF document text
    • https://zogiwabut.weebly.com/uploads/1/3/4/3/134364715/jamoradukisated-zokoguwedonusek.pdfIn PDF document text
    • https://gusobukenifoku.weebly.com/uploads/1/3/4/5/134525986/b5ab9bf42.pdfIn PDF document text
    • https://pixijitawe.weebly.com/uploads/1/3/4/5/134593468/devuji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402501/normal_5fe74ec9652bd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nitezug.pbworks.com/f/learning_colors_in_spanish_worksheet.pdfIn PDF document text
    • http://sonogari.pbworks.com/w/file/fetch/145095474/how_to_setup_chromecast_device.pdfIn PDF document text
    • http://panuduxeruv.pbworks.com/f/58254088805.pdfIn PDF document text
    • http://bevosox.pbworks.com/f/lilovegidibefa.pdfIn PDF document text
    • http://gikomewo.pbworks.com/w/file/fetch/145277589/wewusuli.pdfIn PDF document text
    • http://dijakezepo.pbworks.com/w/file/fetch/144458160/ode_to_joy_2_remo_drive.pdfIn PDF document text
    • http://nilanom.pbworks.com/f/43590226002.pdfIn PDF document text
    • http://munonoraze.pbworks.com/f/what_is_code_971_on_irs_transcript.pdfIn PDF document text
    • http://viluxese.pbworks.com/f/balasaheb_shinde_marathi_vyakaran_book_download.pdfIn PDF document text
    • http://nugewus.pbworks.com/f/sound_forge_7_serial_number_keygen.pdfIn PDF document text
    • http://sezipakupuw.pbworks.com/w/file/fetch/145241541/70616284471.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001133b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133B 5320 bytes
SHA-256: 9e44c1ed6000b0adadadc6803a450d80261086858bc2adbd8313ef0567fe0fb9
font_01_sfnt_off0001253e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1253E 11216 bytes
SHA-256: 2ad0290aa8f1d57fd78901bb01fa194ae34cd5336133b9a1780b4c179c9622f0

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