Malicious PDF — malware analysis report

Static analysis result for SHA-256 b02c71e1fd01b9db…

MALICIOUS

PDF

79.9 KB Created: 2021-04-04 15:29:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ceb38d9af6aa952186c0b7b11398f730 SHA-1: 16f027532df884dfe43a3591ac0e8cee70659c8f SHA-256: b02c71e1fd01b9db1128e13bfca2ebb093d4601a1fba5a973c0b1ed2c1711885
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://xajibur.ru/award?keyword=autonomous+vehicle+control+pdf PDF link annotation
    • http://tadajixilatu.scienceontheweb.net/how_to_draw_101_cartoon_characters.pdfIn PDF document text
    • http://vumajufeboxidik.mywebcommunity.org/vusodotipokudix.pdfIn PDF document text
    • http://bravos-kids.ru/how_do_police_conduct_an_investigation1r023.pdfIn PDF document text
    • http://labebatazavanoz.mygamesonline.org/bibudutafikuliwogi.pdfIn PDF document text
    • https://topigofifudonif.weebly.com/uploads/1/3/5/3/135304546/zotisiwizen.pdfIn PDF document text
    • http://gatorama.fun/dewalt_chop_saw_dust_collectionw4f3o.pdfIn PDF document text
    • https://fumumakol.weebly.com/uploads/1/3/4/0/134017799/lugegulix-pizonarufarur-bolotaxusetav.pdfIn PDF document text
    • https://topigofifudonif.weebly.com/uploads/1/3/5/3/135304546/fokidogasobu.pdfIn PDF document text
    • http://cadenalia.com/statistical_mechanics_book_redditvfu9q.pdfIn PDF document text
    • https://luvatuxi.weebly.com/uploads/1/3/4/3/134321506/zipaze-wuxir-dufusivokewopa-zipozojumepa.pdfIn PDF document text
    • https://favonewe.weebly.com/uploads/1/3/2/6/132695639/063dc93e50c.pdfIn PDF document text
    • http://runojiwum.getenjoyment.net/acls_algorithm_2020_aha.pdfIn PDF document text
    • http://psychologyrelax.xyz/how_to_describe_fall_season6gxxh.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://pavafisufopu.myartsonline.com/android_studio_tutorial_point.pdfIn PDF document text
    • http://xuxalonitu.onlinewebshop.net/statistics_agresti_4th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e2a6a72-ab5f-42d8-9b9b-08d1d0c5becd/xofebakor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63b1b2ed-658f-45bb-ad10-674fb7ad8cd4/92405279921.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c4a13b7-3844-4480-85bc-314375beafc4/william_faulkner_biography_in_english.pdfIn PDF document text
    • http://zevusup.atwebpages.com/42374326579.pdfIn PDF document text
    • http://vavadot.onlinewebshop.net/70483596558.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/19438172614.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45a82aa0-6db7-4716-a5d1-ae17fce1291b/rofudemeborufinulukemizez.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/georgia_drivers_permit_age.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_off0000edb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB7 5116 bytes
SHA-256: 3c35d832bc1fbf471b312bb747d2e4070bb018701a3adff3784b32ae77e647a7
font_01_sfnt_off0000fef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF5 10640 bytes
SHA-256: 2b6ca3237ad4cdda4bc31913201cc1c8ba7a472d3490fb325fc339a343167a05
font_02_sfnt_off0001236d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1236D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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