Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ba85609b7abc687…

MALICIOUS

PDF

76.8 KB Created: 2021-02-26 13:05:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: cdcad9ba339af1e202d5f2deba4737d4 SHA-1: 81cdf569ca68bee2d9b2ffa274025f68e5bf0201 SHA-256: 1ba85609b7abc687b2259b099cfdd88992c4e0e990b401d2518703a844c698f2
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious content. It contains numerous embedded URLs pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The presence of external URIs and the overall structure strongly suggest an attempt 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://midufefew.ru/award?keyword=pioneer-radio+sph-da+120 PDF link annotation
    • https://ragenakesigufu.weebly.com/uploads/1/3/2/7/132740294/temix_nezowinalasu_timebetawaviso_zolowuvomat.pdfIn PDF document text
    • http://shoop-fn.ru/how_to_change_the_chime_on_adtt2rdf.pdfIn PDF document text
    • http://sandwichhq.club/483345551527xwiy.pdfIn PDF document text
    • http://remontnatali.ru/875635600736wfnw.pdfIn PDF document text
    • http://ita-bio.fun/857263262368ahl.pdfIn PDF document text
    • http://giocodigital.website/biceps_workout_at_homey28h3.pdfIn PDF document text
    • http://homiak.fun/278446005769n4y7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380405/normal_5ffbaf6435b9e.pdfIn PDF document text
    • http://tumbaa.space/walumaxuxomosalunusawasugw4uw.pdfIn PDF document text
    • http://lexanizisujufum.66ghz.com/marathi_audition_script.pdfIn PDF document text
    • http://trokot-online.xyz/xupinofatyi.pdfIn PDF document text
    • https://ruwizugaxuluba.weebly.com/uploads/1/3/4/7/134759804/126bad5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470521/normal_5fd9e1ec3407b.pdfIn PDF document text
    • https://cdn.sqhk.co/wenudiwome/bthgjag/subscribe_virus_on_iphone_calendar.pdfIn PDF document text
    • https://cdn.sqhk.co/boxumiza/23Mgh1F/vugubopejopugopepovazilow.pdfIn PDF document text
    • https://cdn.sqhk.co/jesarijufe/gjjisRa/coloring_book_pages_baby_animals.pdfIn PDF document text
    • https://cdn.sqhk.co/miwavilusaji/gchx2jh/gemexujodoxuzu.pdfIn PDF document text
    • http://lavkavkusa.store/chancellor_williams_the_destructionckso4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ecac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAC 5376 bytes
SHA-256: 3392c39a179cb9a153b2cae673764adf7e1a55b1aeb21f4274513061e0d8ab89
font_01_sfnt_off0000fef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF2 11024 bytes
SHA-256: 803fead3cf4611c2fb7479287ba35c729aa6ea30fc5219f9cfc8b89e93c89cea

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