Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ad036e1fe5be9d4…

MALICIOUS

PDF

78.5 KB Created: 2021-06-02 12:48:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e0471f95b3cc87e4bfe3cb4cc72c64d9 SHA-1: 108b39916270b68511f5f278cf64e7b4761930d3 SHA-256: 6ad036e1fe5be9d43fa39efa1a931c9ab02a9ab3273a01d730d41866ccff2b67
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 0.9991

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://cructi.ru/pbw?utm_term=shark+fin+trading+pdf PDF link annotation
    • https://sitasujo.weebly.com/uploads/1/3/4/8/134876827/54c1bb467521.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392869/normal_6029a5b37b063.pdfIn PDF document text
    • https://nagagixibedixu.weebly.com/uploads/1/3/1/6/131606435/2798531.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4417645/normal_60b6eb0892218.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451045/normal_6023bb6851fda.pdfIn PDF document text
    • https://potukogigiso.weebly.com/uploads/1/3/1/4/131407148/gedaxepenas-bufenise-neditilafiv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426418/normal_5fec756b39dea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375521/normal_5ff4358aa0639.pdfIn PDF document text
    • https://wevikafajaxa.weebly.com/uploads/1/3/1/1/131164556/jinolefajumari.pdfIn PDF document text
    • https://mixiwosut.weebly.com/uploads/1/3/4/5/134599068/6c55bad02320a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379486/normal_5fdc269418ed2.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
    • http://togiwuvoze.pbworks.com/w/file/fetch/144480750/french_verb_conjugation_table_ecrire.pdfIn PDF document text
    • http://pugaxigodaka.pbworks.com/f/can_we_really_get_free_diamonds_in_free_fire.pdfIn PDF document text
    • http://bomasasawavi.pbworks.com/f/wulotimozonokirebo.pdfIn PDF document text
    • http://depowota.pbworks.com/f/simple_past_present_perfect_worksheet.pdfIn PDF document text
    • http://jajafad.pbworks.com/f/solving_right_triangles_using_trigonometric_ratios_calculator.pdfIn PDF document text
    • http://genarozep.pbworks.com/f/ptv_sports_live_streaming_app_download.pdfIn PDF document text
    • http://pilujibos.pbworks.com/w/file/fetch/144486057/68964934171.pdfIn PDF document text
    • http://bovojigu.pbworks.com/f/begomananalixusozigo.pdfIn PDF document text
    • http://sorawako.pbworks.com/f/kabhi_kabhi_film_songs_mp3_free_download.pdfIn PDF document text
    • http://wuranosa.pbworks.com/f/toro_ss5000_drive_belt_routing.pdfIn PDF document text
    • http://xoxafepapesu.pbworks.com/f/vilub.pdfIn PDF document text
    • http://larabefejaji.pbworks.com/w/file/fetch/144484122/is_ben_10_alien_force_on_netflix.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8ED 4820 bytes
SHA-256: 856b0e73f689ea45d934f1b65640cd18376c073e06cec750b8f52c2ce2c23e54
font_01_sfnt_off0000f937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF937 10988 bytes
SHA-256: 5f954d0b8e01f07f91b08e154695094b68bc16be103ed814b241898fe75c9135
font_02_sfnt_off00011e7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E7C 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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