Malicious PDF — malware analysis report

Static analysis result for SHA-256 289cdc51f8455d1b…

MALICIOUS

PDF

152.1 KB Created: 2021-04-06 05:56:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2529b75d674d649c726789608b4851b6 SHA-1: 118c68e990e9c291c058ca05c4b806fce5c9a000 SHA-256: 289cdc51f8455d1b035f957a7a4f828298c8f646ec5d385796add58e55e78f59
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 0.9986

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://dafemum.ru/strik?utm_term=metal+gear+solid+5+gameplay+part+1 PDF link annotation
    • https://tekoriforeta.weebly.com/uploads/1/3/4/6/134639422/pitoperib_pufisixi.pdfIn PDF document text
    • https://gegixigozazewit.weebly.com/uploads/1/3/4/8/134858275/7481597.pdfIn PDF document text
    • https://bituxomixa.weebly.com/uploads/1/3/4/1/134131270/6210029.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://69a21580-3c80-4f81-8097-1ec0bc18215d.filesusr.com/ugd/bd7df1_be21144523894ea991e30ce78b50fb12.pdf?index=trueIn PDF document text
    • http://vawunelevuwatex.epizy.com/battery_tender_plus_manual.pdfIn PDF document text
    • https://2b12d24f-0c9a-4a32-b427-430aba395f0c.filesusr.com/ugd/6cfe90_c5072b34198548ad8c70165f98941cef.pdf?index=trueIn PDF document text
    • https://52a72965-a6d2-471e-b66a-59a59a4d663b.filesusr.com/ugd/e643da_85b61c34fa2e431ead2aacd3ccf6445c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/birodudozunukivizukiwi.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/kumopukuxukapiviledepa.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/expressing_possibility_probability_and_certainty_exercises.pdfIn PDF document text
    • http://dezoruxeg.epizy.com/apartment_guide_florida.pdfIn PDF document text
    • http://buxazub.epizy.com/kivimavejosulezajufupo.pdfIn PDF document text
    • https://45e41439-46a4-4c97-84f0-155cfeda4cef.filesusr.com/ugd/9d7ad9_35146e6bbe4f40f69a6cbb6d48978f1e.pdf?index=trueIn PDF document text
    • http://komiguzuvare.rf.gd/how_to_move_a_window_to_another_screen_with_keyboard.pdfIn PDF document text
    • http://sosirowop.epizy.com/tcl_remote_code_spectrum_rc122.pdfIn PDF document text
    • https://bd5e8a39-7345-4d1c-b933-e8ec171ec4b0.filesusr.com/ugd/2dab9e_2cea4aa77b0e458385a5ab5f814baf41.pdf?index=trueIn PDF document text
    • http://ragigixo.epizy.com/vavijukari.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ca48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CA48 19604 bytes
SHA-256: a856a9e19a1329febc3a4b2b64ebd8df7477d2b2cf3cdb3e27f4d842c068efb0
font_01_sfnt_off00020938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20938 5244 bytes
SHA-256: 16d1281301cd53b36c0e3717edb402185d89fd080d31902bcf9589a461d1c7e7
font_02_sfnt_off00021b26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21B26 12688 bytes
SHA-256: a541583200db53ebcaddfeef924950fd12f1c44cce739504a45ce75270533d2f
font_03_sfnt_off00024529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24529 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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