Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f2258839a056de0…

MALICIOUS

PDF

72.1 KB Created: 2021-02-28 20:06:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 005d7bc20ee936c0bde2415916f74350 SHA-1: 5be56cd5187baa6bfe709656896182cb273791d6 SHA-256: 9f2258839a056de030ccc2878585aef8856b0d9bb4846b260d42410eeded16aa
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting a phishing or malware distribution campaign. While no scripts were explicitly extracted, the presence of external URIs and the overall detection suggest the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/wb?keyword=integrated%20chinese%20level%202%20workbook%20answer%20key PDF link annotation
    • http://naturaitalia.space/89700329993w9afj.pdfIn PDF document text
    • https://cdn.sqhk.co/zupitefa/aOjdxid/football_play_card_holder.pdfIn PDF document text
    • https://cdn.sqhk.co/surikuzezun/cEgehhJ/worship_music_about_peace.pdfIn PDF document text
    • http://pedumerik.sportsontheweb.net/tezikuneraranefiverak.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/hbgeibQ/huey_helicopter_scale_model.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386618/normal_5fd9010f9e345.pdfIn PDF document text
    • http://pazujiz.mygamesonline.org/63642060817.pdfIn PDF document text
    • https://cdn.sqhk.co/xawemubimaj/ogisVja/palarominebolote.pdfIn PDF document text
    • http://ruguwafe.scienceontheweb.net/talakewumelagavugigu.pdfIn PDF document text
    • https://cdn.sqhk.co/baxorurifina/hKJihid/asterix_and_friends_wiki.pdfIn PDF document text
    • http://center-san.ru/61975886980es3i5.pdfIn PDF document text
    • http://fipizilemuwob.medianewsonline.com/merajenifivuvudupuxepifur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483854/normal_602aed95e729a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460241/normal_5feb1b23d72b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465702/normal_601a63a308098.pdfIn PDF document text
    • http://robertferrell.net/understanding_the_bible_commentary_series_bakerfptwe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/81753489791.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/weathering_erosion_and_deposition_test.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/ergogenic_aids_athletic_performance.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_off0000c83a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC83A 5264 bytes
SHA-256: b3e725c7f1c659829f2e3d0a3df7a945ca7bc53edc3f7b6dcc7eaf9d476e4d0c
font_01_sfnt_off0000da2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2F 5728 bytes
SHA-256: cf4c42c8db5a1eecd2fa09133d0885f3ba144151a1803f3e26825baf6a0a208e
font_02_sfnt_off0000edc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC8 10868 bytes
SHA-256: 56813a8daa9c89a5f1c5e770667b28be2adc04cb5015b8cc8231de8c4d595c91

Open this report in the interactive analyzer, or submit your own file for analysis.