Malicious PDF — malware analysis report

Static analysis result for SHA-256 beccd4f0a14f1bd5…

MALICIOUS

PDF

79.5 KB Created: 2021-03-16 07:13:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 22bee840bd51da990779d53b20f8320f SHA-1: 98697fe9ea970763771d4f59b1eab12897693719 SHA-256: beccd4f0a14f1bd5001a9e450cb2d22a7e29e92a84ae9a8c49e4300c951bc32a
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://jumiwimov.ru/aws?utm_term=carbs+in+burger+king+crispy+chicken+sandwich+no+bun PDF link annotation
    • http://hookup157.online/how_much_is_a_first_generation_ipod_touch_worthqs1ax.pdfIn PDF document text
    • http://ravigimojamel.mypressonline.com/seattle_mariners_schedule.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459929/normal_604b7a81c1e1f.pdfIn PDF document text
    • http://gugibugud.mygamesonline.org/tinkle_comics_free_download.pdfIn PDF document text
    • http://raisinsapp.club/jumping_spider_bite_imagesq7dlz.pdfIn PDF document text
    • http://babusokojanog.sportsontheweb.net/90601905971.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387711/normal_5fdb7f7a3881d.pdfIn PDF document text
    • http://nafepuzemobir.sportsontheweb.net/how_to_hurt_him_by_ignoring_him.pdfIn PDF document text
    • http://midimox.getenjoyment.net/benim_hocam_tarih_2020_soru_bankas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415527/normal_5fceb5a1b0528.pdfIn PDF document text
    • http://pebonemariv.mypressonline.com/how_to_eat_fried_worms_movie_rating.pdfIn PDF document text
    • http://pejagepelif.iblogger.org/guzojezuju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486037/normal_5ffa93eaae408.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://govatojajij.epizy.com/45893123027.pdfIn PDF document text
    • http://kosejoviwo.epizy.com/90451664070.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/15795961052.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/desktop_wallpaper_free_for_windows_8.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/abhinetri_2_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/origami_bookmark_heart_instructions.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_off0000e79c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79C 5528 bytes
SHA-256: 6ec9fb07791af3cc69a079f19ef4e4afd843a4ea92c96532b3d01adfc3cbfe31
font_01_sfnt_off0000fa71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA71 11660 bytes
SHA-256: 1b1327f3da0dcc1f3e5bda471862f47e8d11eae145bc7c6b868480bcb775eac3
font_02_sfnt_off00012238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12238 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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