Malicious PDF — malware analysis report

Static analysis result for SHA-256 b95e36bd94a9a65e…

MALICIOUS

PDF

79.0 KB Created: 2021-04-26 17:34:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0269bab95c150e788b43ee2f5f910692 SHA-1: 709a2f94f43c0c616de2f4cd1cb1ac2720b84f06 SHA-256: b95e36bd94a9a65e79af8baeea3cc816b52170cf1da8faebfeeafe50972465a7
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://zajinet.ru/strik?utm_term=words+in+british+vs+american+english PDF link annotation
    • https://cdn.sqhk.co/pixefavenar/e2Mcwig/74170891556.pdfIn PDF document text
    • http://samudevupogawi.iblogger.org/37950649546.pdfIn PDF document text
    • https://cdn.sqhk.co/dijogiper/iigdvgh/discount_silver_dollar_city_tickets_at_price_cutter.pdfIn PDF document text
    • https://cdn.sqhk.co/tesolivu/6gighgc/zavuvaromizabevupar.pdfIn PDF document text
    • http://tumijosejagag.22web.org/84676567097.pdfIn PDF document text
    • https://cdn.sqhk.co/batumozi/Yyicihg/autonics_panel_meter.pdfIn PDF document text
    • https://cdn.sqhk.co/goberirud/amjeWTz/45980178021.pdfIn PDF document text
    • https://cdn.sqhk.co/reposivekow/fghhajf/yandex_music_er_online.pdfIn PDF document text
    • https://cdn.sqhk.co/fowijuseziju/ahfkMcF/fuvubos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fee5c88e-2671-4b18-90a3-2c8741bcc049/la_chola_chabuca.pdfIn PDF document text
    • http://tidegofavinugaw.epizy.com/posulufomojivevajuza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9113b01-c1e7-4cb7-91c1-1bbd0488d1a9/9846785532.pdfIn PDF document text
    • http://xogowiv.epizy.com/que_es_la_genetica_cuantitativa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58cf0e4d-fdf1-4cfd-b2c7-dfcaadc5a709/68395309247.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/157e3d63-292c-402a-a42e-2281f14782e4/zimusesokufizusixivubeko.pdfIn PDF document text
    • http://biguvuxurezuto.epizy.com/71281007623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85fe56fe-2075-4d6c-a8ce-c8a71b0b608c/95457659241.pdfIn PDF document text
    • http://kadanokadija.epizy.com/61889546866.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05bf6e70-0756-4584-b761-4b4df33f4bc3/72745837281.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8e87bcb-748e-4e69-93c5-314ed0b6adc4/kitugefojimawomin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80639baa-f023-4059-bbea-387d0effe3bf/printable_math_worksheets_simple_addition.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_off0000f67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67D 5564 bytes
SHA-256: a13e00d4bd7a40dbf871be0d55f0a44948e12d6c0e4760b4bcddaa9067c200d9
font_01_sfnt_off0001094e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094E 10996 bytes
SHA-256: 5e9ff10aef5929e832af788448c68bfcb0937ec223da66f1b09bc2192549d7a6

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