Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e17387fd53a5f3e…

MALICIOUS

PDF

79.2 KB Created: 2021-06-06 10:09:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ff903e3858eb9df76a0fb6fad90daa05 SHA-1: 90f4d5d2df854f474dd51ff66aeea1089e2224a5 SHA-256: 1e17387fd53a5f3ec2872113dd0d74797e0dda1a1e3374b5204742d45421090d
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 0.9950

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://wastran.ru/pbw?utm_term=best+free+live+video+chat+app+for+iphone PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4500200/normal_5fd183f479578.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406820/normal_6014ff1c94d10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379719/normal_6009f58d3720b.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://tefimemovem.pbworks.com/w/file/fetch/144659793/is_neutrogena_french_milled_bath_soap_antibacterial.pdfIn PDF document text
    • http://mefijunov.pbworks.com/f/what_are_the_characteristics_of_listening.pdfIn PDF document text
    • http://sokulus.pbworks.com/w/file/fetch/144655119/free_welcome_bonus_no_deposit_sport.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4005a93e-6978-4feb-bbe8-466384de99e7/nabawadefojunaduwakuwuzen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5fe5694-d5cd-4d6a-b898-e08239cac3af/12825735134.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81199406-5875-4d6f-9ce0-03b457e29492/xukovijewusaputud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90c758d2-b9a3-4755-a958-cbeb9b2d502c/kemper_profiling_amp_head_bk_s_bundle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9a468cc-b753-46c1-8389-ac78740969fa/can_i_fake_bank_statement.pdfIn PDF document text
    • http://garifukedako.pbworks.com/f/how_to_play_clash_royale_on_chromebook.pdfIn PDF document text
    • http://xoxafepapesu.pbworks.com/w/file/fetch/144598977/morifaripujulamivumusinut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50717651-7685-40ba-8a10-e121959e5322/45316618847.pdfIn PDF document text
    • http://kivotin.pbworks.com/f/meriwobanoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bedf945-1c17-4569-aeac-048a1024a536/10090050421.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88809b36-ba0a-433d-805d-0ce5c533eed4/7954913253.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d93c48d-6c46-4e02-982e-60a8dd03dfa0/washington_dc_area_population_growth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58f1394f-53ac-420c-b05e-9493d8d3b1b6/nupix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ab454ac-8bc4-482f-a9c7-b751f26aeefb/bovalugirebofinawarojix.pdfIn PDF document text
    • http://furalagaposu.pbworks.com/w/file/fetch/144670785/funny_short_stories_in_arabic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0367c4d-862e-48d8-83aa-998ad66ab554/toxatogimiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afdf2731-718b-4bd6-9f17-249f59fe8599/mendelian_genetics_practice_worksheet_answers.pdfIn PDF document text
    • http://wudiwiligis.pbworks.com/w/file/fetch/144542685/acceleration_worksheet_answer_key.pdfIn PDF document text
    • http://lugozamuxika.pbworks.com/w/file/fetch/144422037/most_common_words_in_english_language.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d2b3f7e-7ca4-440f-8d30-d162c8ea6777/will_you_come_and_follow_me_hymn_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0fc1e92-4da9-4052-b0a0-b03c6ca0a88d/62913835847.pdfIn PDF document text
    • http://rozeluf.pbworks.com/f/wind_beneath_my_wings_piano_solo_sheet_music.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_off0000eb4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4B 5140 bytes
SHA-256: 9252dfa6d4ff76f179f19c5079f4583a18fa5ede7c751d77127525cdfb8c5fd0
font_01_sfnt_off0000fcc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC1 10532 bytes
SHA-256: 66fc4ba503072c38c6eadb39de3ec3d425e6753cbe965281a127d5c4407f236d
font_02_sfnt_off000120e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E3 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f