Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d88556e18cb6144…

MALICIOUS

PDF

75.4 KB Created: 2021-02-22 04:47:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d095aa6ca53d94051d0e3fc169415b40 SHA-1: 56da38474e99ba92ac1c67ea56c0667a053dbefc SHA-256: 8d88556e18cb6144e3f5f53c9f07b74d42f05f33c42acb6c3cc364e7490d1412
126 Risk Score

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 0.9996

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://jottigo.ru/strik?utm_term=coach+carter+our+deepest+fear+speech+text PDF link annotation
    • https://mefosenide.weebly.com/uploads/1/3/4/7/134715399/batanajokibuge-puxakak-selarosujoponi-bebogulivow.pdfIn PDF document text
    • https://sopidafepu.weebly.com/uploads/1/3/4/7/134744384/purokenodexevaw-timitigasujux-suderinujufaze.pdfIn PDF document text
    • http://ibkreactiva2020.com/lesunopifibejivanudun23oby.pdfIn PDF document text
    • http://converstarget.ru/mitologia_griega_diosa_de_la_sabiduria_y_artesereo6.pdfIn PDF document text
    • http://sifulodidikit.22web.org/set_theory_problems_with_answers.pdfIn PDF document text
    • https://dopovubejaxow.weebly.com/uploads/1/3/4/0/134017692/jagotow.pdfIn PDF document text
    • https://pidumiwululixew.weebly.com/uploads/1/3/4/0/134095913/9940882.pdfIn PDF document text
    • http://iuts.space/darezaligolonijvxda8.pdfIn PDF document text
    • https://sofubozunorupid.weebly.com/uploads/1/3/4/6/134668483/vukukafis.pdfIn PDF document text
    • http://fitdieta.com/dragon_ball_gt_dubbedx1rdv.pdfIn PDF document text
    • http://adanakebap.org/359612531227bvk5.pdfIn PDF document text
    • https://cdn.sqhk.co/zejizoguzut/hhmyOPS/sputnik_trailer_espanol.pdfIn PDF document text
    • http://zvezdasevera.online/74321406399g6t2v.pdfIn PDF document text
    • http://sehq.xyz/muxepop4pyi.pdfIn PDF document text
    • http://pedron.fun/immense_synonym_formalu91ct.pdfIn PDF document text
    • http://milky-rp.space/destilacion_por_arrastre_de_vapor_practica4h0bo.pdfIn PDF document text
    • https://farazekij.weebly.com/uploads/1/3/4/3/134379469/e5d3090381.pdfIn PDF document text
    • http://center-san.ru/alcatel_4g_lte_dongle_manual0sh3z.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zowujobosega.rf.gd/baduvilarekusos.pdfIn PDF document text
    • http://runapapaxezupow.rf.gd/dotuzupiwopozoxazuvatuf.pdfIn PDF document text
    • http://piwirapofo.epizy.com/methods_of_reporting_accidents_at_work.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A8 5184 bytes
SHA-256: a9084dd02ecbafbd4ac7db571b857994c6b9168bdd53a021ab628ce1c57a154a
font_01_sfnt_off0000e448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE448 11208 bytes
SHA-256: 39eef4c79bfc9e705e82ca85d4eb6fda16bdf7c2274494cd6d5511582ec71b84
font_02_sfnt_off00010ac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC2 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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