Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd1e01d522541854…

MALICIOUS

PDF

80.0 KB Created: 2021-03-25 12:51:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4cbe5ea972add400cc0bad98c1dfa3b7 SHA-1: 11ddc3eeacd679b85c920f11fc0b89274d6346e5 SHA-256: bd1e01d522541854782983e2e1bdeec3c36bf7e17f5f640a792d6e4bb2cd2d22
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 0.9997

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://fokemale.ru/123?utm_term=audio+visual+aids+in+nursing+education+pdf PDF link annotation
    • https://joxejiduzimomad.weebly.com/uploads/1/3/1/3/131383973/8716595.pdfIn PDF document text
    • http://usacreditmonitoring.info/error_wow_failed_to_open_archive_interface.mpqfyhs2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489976/normal_6026d5a340384.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386607/normal_6008cdb6d59a5.pdfIn PDF document text
    • http://dalodafi.22web.org/is_there_3d_touch_on_android.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368751/normal_5fca594427465.pdfIn PDF document text
    • https://lekevemu.weebly.com/uploads/1/3/0/7/130776436/gujojosov.pdfIn PDF document text
    • http://natlab.ru/los_2_periodos_de_la_historia_natural_dela_enfermedadxtvov.pdfIn PDF document text
    • http://giftcard-sale.store/what_battery_does_a_jeep_grand_cherokee_key_fob_takee687e.pdfIn PDF document text
    • http://rebejuguvodog.22web.org/lapijubujepoxofevadetaz.pdfIn PDF document text
    • http://santecmb-sarl.com/buxezafaxilovapoj5q88.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370057/normal_6006647eb581a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492529/normal_5fe76927c6d24.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bepibuxel.epizy.com/film_bedevilled_2016.pdfIn PDF document text
    • http://nupatugo.epizy.com/46030210979.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21fa109d-7a9d-4540-aa06-d5dc20fed39d/how_many_quarts_of_oil_does_a_bmw_330i_take.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7301e096-c7a1-45bb-ae12-02a7bec0575b/91116761801.pdfIn PDF document text
    • http://sujetokotew.rf.gd/74585857657.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0edc879-5347-46bd-82f1-2d0beda98451/zugepovurunevetotusinu.pdfIn PDF document text
    • http://zelimuperuna.rf.gd/galvanic_corrosion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43b458d8-5cf7-43ae-a6d7-63b86e9e2ab6/77611457812.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB46 5372 bytes
SHA-256: b2cb5293841b517bf7267fd0bf66fd6424bb1a5e37c6513f71ebeb4642db9b83
font_01_sfnt_off00010da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA4 10660 bytes
SHA-256: 49f70317e1883b5a3dd6ffeb04ab7e9c262d5b3b5cefad9626794b3ffab5ddaf

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