Malicious PDF — malware analysis report

Static analysis result for SHA-256 2715f756296b22e7…

MALICIOUS

PDF

74.9 KB Created: 2021-05-01 20:35:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ff152ab2586937d381ebcde9e8f34d43 SHA-1: bd9c9d8ae3622e967f545c2e3d0c8d36f87d3636 SHA-256: 2715f756296b22e78515c0589454669efd4cfb07212c24088877b3c9dddb20b2
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 0.9997

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/strik?utm_term=can+i+drive+alone+with+my+permit+in+maryland PDF link annotation
    • http://legiontry.online/what_math_concepts_are_on_the_sat43ocm.pdfIn PDF document text
    • http://vertigoa.online/princes_gambit_summary4g0ba.pdfIn PDF document text
    • http://cosmicgig.com/kusogavuwiduzidotumobateqt4wp.pdfIn PDF document text
    • http://astropsychology.site/focusrite_scarlett_6i6_tutorial_espaoli5iz5.pdfIn PDF document text
    • https://gavatuwideziwi.weebly.com/uploads/1/3/4/3/134352821/fituwokufinekuf.pdfIn PDF document text
    • http://digtalcaliper09.xyz/mulesuxovugokizggk6i.pdfIn PDF document text
    • http://trydouche.xyz/arduino_nano_33_iot_esp32avd0y.pdfIn PDF document text
    • https://belanuxaru.weebly.com/uploads/1/3/4/6/134670531/zadepi.pdfIn PDF document text
    • http://laditosos.iblogger.org/37294466953.pdfIn PDF document text
    • http://nunegotopexipo.iblogger.org/herbarium_sheet_size.pdfIn PDF document text
    • http://magazinrf.xyz/factory_design_pattern_real_time_example_in_java2iseg.pdfIn PDF document text
    • https://tefajarusi.weebly.com/uploads/1/3/0/7/130775660/mudipupitipuf.pdfIn PDF document text
    • http://rokexulom.22web.org/96485147986.pdfIn PDF document text
    • http://xipevufizokev.iblogger.org/dimijasafexani.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dafiwogi.rf.gd/bobudoteru.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/significance_of_incisal_guide_angle.pdfIn PDF document text
    • http://wafijavira.rf.gd/words_describing_moonbeam.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/wokukaju.pdfIn PDF document text
    • http://dajizipazubeva.epizy.com/floral_border_royal_blue_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/wow_vanilla_leveling_guide_addon.pdfIn PDF document text
    • http://zujogazew.epizy.com/65002196937.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D2 5180 bytes
SHA-256: 5b113e7eaff1fdc8827581a61740111a6f8225cb1f8b54f154b0034789fa8e18
font_01_sfnt_off0000f858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF858 11012 bytes
SHA-256: 46f8cdc763c681710f8dd6735ef145721186de00ee70830ebaca2e2926a45209