Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0787361f15692ab…

MALICIOUS

PDF

78.6 KB Created: 2021-04-01 08:55:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 4445095e9904c91c79fc8b4280bc65a6 SHA-1: a1750b2431dbdbac334e80d38f96ef03a439c088 SHA-256: e0787361f15692ab0980a5f1c86e6f8a64193b6cb5c73314188c9b5d470c3be9
126 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, many of which point to disposable domains and are likely used for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains text related to 'ramp certification test answers', suggesting a lure to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/wix?keyword=ramp+certification+test+answers+pa PDF link annotation
    • http://srakan.space/xidamudafoguvigopxfll7.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/jhYhbc6/zizusagaderokuvajulejaf.pdfIn PDF document text
    • https://cdn.sqhk.co/ragejeli/idpaPQP/real_bike_racing_2020_racing_bike_game_real.pdfIn PDF document text
    • http://xijivedijimidip.mygamesonline.org/famous_books_and_authors_2020.pdfIn PDF document text
    • http://interbank.link/miwavizezizejogovaguduliqrmsz.pdfIn PDF document text
    • http://vvd.bar/xajoket9tlok.pdfIn PDF document text
    • http://hh666o.site/jugogenenujubagepisuzimalkuxqe.pdfIn PDF document text
    • http://ganedoxumizaj.sportsontheweb.net/majofefomudidigatimupuf.pdfIn PDF document text
    • http://vorgazme.com/20851289530owvrp.pdfIn PDF document text
    • http://koreanluxe.com/why_do_atoms_join_together_in_a_compoundsv2rs.pdfIn PDF document text
    • http://duplicwcnj.space/vunosibufofuniwogeziduq02mf.pdfIn PDF document text
    • http://reform-st.ru/electronic_devices_and_circuits_mcq_with_answers_download95x1v.pdfIn PDF document text
    • http://buybritishcat.com/14204927909aapnx.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/cphggiu/854417016.pdfIn PDF document text
    • http://devicesprotectionforusers.site/gugurobedadoe2csc.pdfIn PDF document text
    • http://usesalon.xyz/1369716936421z4i.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f07eb630-23ff-4298-a1df-d7940f1ba2dc.filesusr.com/ugd/097a5b_268cb379d01540ef89ad0f6970270b28.pdf?index=trueIn PDF document text
    • https://a8a70d16-e3f0-4805-b115-4d8c62c40b57.filesusr.com/ugd/82e28d_33863c1b20114b1c903048cf7a5c7cd2.pdf?index=trueIn 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 3

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_off0000f918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF918 5228 bytes
SHA-256: bba526d2e2e2f6166bf3101fb6aa1837f68ead0897acc62692e5294d5555fa6e
font_01_sfnt_off00010ae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE7 10104 bytes
SHA-256: ea3a524a9d404e2f1c48b691cd8ace50a70756e3d45b2f500ebb72e3a321f2a7

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