Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a695aea53c91e6e…

MALICIOUS

PDF

75.5 KB Created: 2021-05-17 09:18:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8e56aab772914975d8325887ad48d787 SHA-1: 103ca5838841982188ea09d9c43fd67a0b0b2cf4 SHA-256: 0a695aea53c91e6edc0fb690214adc51afb6e1eeb3de984fd53003f218e62c47
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 0.9998

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://golowaki.ru/strik?utm_term=how+to+set+s10+scan+atomic+clock PDF link annotation
    • http://winoorama.site/bleach_ost_336307.pdfIn PDF document text
    • http://theandyhong.com/finagiwieuvlr.pdfIn PDF document text
    • http://fitdieta.com/what_happened_in_american_gods_season_2_episode_8iyjp4.pdfIn PDF document text
    • http://muzesumulel.getenjoyment.net/baby_song_lyrics_download.pdfIn PDF document text
    • http://circus.market/ledoxipuwebutapnkgqk.pdfIn PDF document text
    • http://lasns.fun/starcraft_brood_war_ums_mapsp4ika.pdfIn PDF document text
    • http://fruitslope.online/wool_hugh_howey_downloadloouw.pdfIn PDF document text
    • http://myyshooop227.site/bluestacks_installer_for_pcqfr77.pdfIn PDF document text
    • http://likelid.xyz/87727275489t5jy.pdfIn PDF document text
    • http://sumodena.getenjoyment.net/qaamuuska_af_soomaaliga_1976.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/webipejonavuv/i__m_starving_starved.pdfIn PDF document text
    • http://makakanow.onlinewebshop.net/xurinivakeririfuku.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/homeless_bird_chapter_11.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/674c071b-08ed-439e-8d51-d3600887049e/zudukutozub.pdfIn PDF document text
    • https://d73c234d-0e3d-497d-8108-d5659bace061.filesusr.com/ugd/58a813_a722822adbf64da397e8bbb44be10935.pdf?index=trueIn PDF document text
    • https://6e3eaeb2-b9dd-4462-8b56-96c59beebd9a.filesusr.com/ugd/dcc11b_69e697a254c5457292de9f7b4a78c343.pdf?index=trueIn PDF document text
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_e96674931a1344809f48752890443cc3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c23002b-e3ac-4f05-a174-4c627a0ab1f0/76523805587.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/218d3a93-386a-4304-b41b-7526c2e4a1ee/whats_another_word_for_young.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC94 5160 bytes
SHA-256: 7e782acc2dbf3c7baa1e5bfbf624533cc594eaf8fa9cc8dae4430643985ffd0d
font_01_sfnt_off0000fe2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2A 10588 bytes
SHA-256: 8fd4bf7300b68f0681c546d69c6d2dd91e763ff1e1b6f682d320abaaba782627

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