Malicious PDF — malware analysis report

Static analysis result for SHA-256 f62ee40d1a8a9451…

MALICIOUS

PDF

76.0 KB Created: 2021-03-24 16:41:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6412f55460071422b67cb19da0bb74ae SHA-1: 785b57ef6f97a3d827aa890a463a5f962c662790 SHA-256: f62ee40d1a8a94511bb68af72445966b8e7e7a01bff7ba1f7b3c9eb2f0adae2b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant number pointing to disposable hosting or unknown reputation domains, suggesting a phishing or malware distribution campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm on disposable hosting, further supporting malicious intent. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or a trojan.

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://nipisod.ru/123?utm_term=allocation+logement+caf+pdf PDF link annotation
    • http://thelait.pro/what_is_the_difference_between_iso_9001_and_iso_900065mgf.pdfIn PDF document text
    • http://bestpriceforukraine.xyz/zudiwamatez481ah.pdfIn PDF document text
    • https://cdn.sqhk.co/sogefuluf/Bgeidif/parkour_classes_near_me.pdfIn PDF document text
    • http://craftsmansmetics.com/223931904320k3po.pdfIn PDF document text
    • http://hook-up.fun/99226334761cdyqj.pdfIn PDF document text
    • https://cdn.sqhk.co/kimejijomaki/7A8Rt0c/detevunaz.pdfIn PDF document text
    • https://cdn.sqhk.co/surodamiz/i3igGjb/jedavuteroxufepag.pdfIn PDF document text
    • https://cdn.sqhk.co/molavagew/a9dOkpt/cash_id_top_up_diamond_ml.pdfIn PDF document text
    • http://radanukodufam.22web.org/oklahoma_drivers_license_cost.pdfIn PDF document text
    • http://pizedajunar.22web.org/donigewefawegofu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://godimodasixor.rf.gd/american_sniper_ending_song.pdfIn PDF document text
    • https://a2ae8793-a99f-480d-a3bc-849ef63d34f7.filesusr.com/ugd/cc207a_88dd47a232dd4b6a9cd90adef993757f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9059ba47-34ef-4bc4-9138-f2b0c2142bdb/nanazalijisefubuwonuxis.pdfIn PDF document text
    • https://b1e6e3cd-24a2-426a-8b7d-e8f4bd81915b.filesusr.com/ugd/83e584_fe7ebf041b0d44c0a6cf8cd488adfc5b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/warrior_diet_rapid_weight_loss.pdfIn PDF document text
    • https://8d5bcf17-53f2-4f21-b585-7a27aef14131.filesusr.com/ugd/7baf93_71b8e8e60a7040fab4f6dde997de4193.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/32589733349.pdfIn PDF document text
    • https://7835c217-6b95-46a1-915a-76cdebae3fe0.filesusr.com/ugd/debfb4_8a79f2a62c06461f91807d64bdd243eb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c39e806-c60d-4954-a4b5-1f3398119eb5/dalukovamilaxutig.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/is_the_nyse_open_on_veterans_day_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cd90e98-6d5c-4407-b904-353d301e834f/35151325014.pdfIn PDF document text
    • https://cf336f9a-6a79-4542-9269-5b62d6eb69dd.filesusr.com/ugd/1daf83_2c96f2ee7cec45a0a1f0528083c0f252.pdf?index=trueIn 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_off0000e900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE900 5192 bytes
SHA-256: 3ba09e1e2a41ac9ff1395e787cbd889b7cbf749cf0a271d3fac8933c9cdaae96
font_01_sfnt_off0000faa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA1 12636 bytes
SHA-256: f3ba480ce7e7854012e484f4bcd8c573c4a49a2d4b7115c784404e3ae9c71e2c

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