Malicious PDF — malware analysis report

Static analysis result for SHA-256 76e2ede4f8a70955…

MALICIOUS

PDF

79.6 KB Created: 2021-03-30 09:11:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e45d5001d3ef76c6ca0d0cf980315fe9 SHA-1: 8ddac63552e157380466d7751a5a19ad6facbaa0 SHA-256: 76e2ede4f8a70955b4cb1c804446beb535c2a37f5770b7646f9a1d0e03583869
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://crophysi.ru/award?keyword=centered+riding+pdf PDF link annotation
    • http://ragofilud.medianewsonline.com/central_park_lahore_map.pdfIn PDF document text
    • http://cafe-cok.ru/midugurdem5j.pdfIn PDF document text
    • http://affilateapp.online/kosapanolesapasog8aary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371246/normal_6014f5aea901a.pdfIn PDF document text
    • https://kuxifegofemiza.weebly.com/uploads/1/3/4/8/134865321/mosozapiganinatik.pdfIn PDF document text
    • http://salonvarna.com/sunugotazfqu8e.pdfIn PDF document text
    • http://sopesukenapad.scienceontheweb.net/12788416194.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388178/normal_604b21d8732cf.pdfIn PDF document text
    • https://nobexuliga.weebly.com/uploads/1/3/1/4/131405940/5724100.pdfIn PDF document text
    • http://lnstagramverifycentre.com/216190225071gbh8.pdfIn PDF document text
    • https://kaginugopaz.weebly.com/uploads/1/3/4/3/134310825/2781425.pdfIn PDF document text
    • http://govugododuwo.iblogger.org/asientos_contables_de_compras_ejemplos.pdfIn PDF document text
    • http://lobafor.mypressonline.com/ambient_weather_ws_2902_manual.pdfIn PDF document text
    • http://generatorsale.ru/hisense_portable_air_conditioner_temperature_controlkbiph.pdfIn PDF document text
    • http://vinorama.fun/48766094505u686.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451930/normal_5fca516b595ae.pdfIn PDF document text
    • http://glawerry.online/sex_and_the_city_cast_movie_2kra6d.pdfIn PDF document text
    • http://zamowuve.iblogger.org/bojaronabifatefexijumixi.pdfIn PDF document text
    • http://flymoney.net/country_2_step_rap_songjhv89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476938/normal_600c983982b8a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xanuravafobim.rf.gd/15343349624.pdfIn PDF document text
    • http://sivofabef.epizy.com/49143119452.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_off0000fa67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA67 4696 bytes
SHA-256: 1e008d3f4cc695a237ab553587c6021fc5f4d0dedf851f7aeccce3907d82d07c
font_01_sfnt_off00010a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A74 11528 bytes
SHA-256: f023b1d996103203f39e3c2b50134ee8ffe838efc01814bc8248b731db60aea7

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