Malicious PDF — malware analysis report

Static analysis result for SHA-256 089e8cec14f8aca5…

MALICIOUS

PDF

77.9 KB Created: 2021-03-28 08:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e0a1727dcf0f0ee7d12d119969f905bd SHA-1: 731d43ddb825036e2c5f3c3cecd724d303869329 SHA-256: 089e8cec14f8aca5b193cd0c19c38513ef0971c3e072109adf94717966e80239
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 0.9996

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://leonvi.ru/123?utm_term=alexandria+moulding+pdf PDF link annotation
    • https://cdn.sqhk.co/samekikogeri/qxgjSHp/83309848915.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403429/normal_5ff6685ff20e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375204/normal_6054f549e5ee4.pdfIn PDF document text
    • https://cdn.sqhk.co/xusopusavo/SAKUghl/rhythmstar_music_adventure_wiki.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393514/normal_5fe720f19ceab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_6023d45956839.pdfIn PDF document text
    • http://jerugujekema.getenjoyment.net/57957282127.pdfIn PDF document text
    • https://cdn.sqhk.co/tavolimogid/jihajfA/island_in_the_sun_by_weezer_ukulele_chords.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370989/normal_6042f4909ea51.pdfIn PDF document text
    • https://cdn.sqhk.co/janonaset/idhdWr6/rijis.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/ggWTQ5K/zezaja.pdfIn PDF document text
    • https://cdn.sqhk.co/budatumibowu/hciigjj/32403068116.pdfIn PDF document text
    • https://cdn.sqhk.co/medujebukoma/rhclggx/football_tycoon_apk_mod_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369160/normal_6015fdd6665ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497687/normal_605a10ae833be.pdfIn PDF document text
    • http://poxumanavofeboz.scienceontheweb.net/81653776133.pdfIn PDF document text
    • http://lixorajepidil.mygamesonline.org/tefugop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lazuletezofik.onlinewebshop.net/alvin_schwartz_scary_stories_3.pdfIn PDF document text
    • http://sabiwilurase.atwebpages.com/46983580474.pdfIn PDF document text
    • http://defakulid.atwebpages.com/kudakuwujati.pdfIn PDF document text
    • http://nejesezape.myartsonline.com/93078280508.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_off0000eab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB8 5240 bytes
SHA-256: 9b9b2c761dcca2575e43d64bea5f86a5d6e8973b30c160a92b533da2b0bd993c
font_01_sfnt_off0000fc78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC78 1940 bytes
SHA-256: e6d5f4324b168664fd4da9de57cdfa04594fe49627acb40df87ebfa60c8ed5f2
font_02_sfnt_off000105c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C0 10732 bytes
SHA-256: 7a840f0cd77beceeddab75e3b57eb97e44ee1b3767945db53630244a2611a6bc

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