Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed8e883a1911d10b…

MALICIOUS

PDF

83.0 KB Created: 2021-03-19 14:14:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: adb67985248e7708eee0a7838f592e68 SHA-1: 5c9f6419fd1acbee2bc91e39b6e6bb1f18471a2c SHA-256: ed8e883a1911d10b0887eb5c359c794ed1c83106d2948fc6824bd01ecb6811c0
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a high number of embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://ponafet.ru/wix?keyword=ernies+crab+house+bladensburg+road PDF link annotation
    • http://openchambre.xyz/creative_sound_blaster_z_pcie_gaming_sound_cardxsce8.pdfIn PDF document text
    • http://mebevevi.mywebcommunity.org/fuvazesubeta.pdfIn PDF document text
    • http://itravelimpressions.com/valikebaxidosvgsy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410975/normal_6032da78bda97.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369920/normal_5fdea05ba45ea.pdfIn PDF document text
    • https://cdn.sqhk.co/lilavokolet/sghhe5S/mini_driver_golf_clubs_for_sale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371786/normal_60460fea4e5b8.pdfIn PDF document text
    • https://cdn.sqhk.co/keserina/ifhiYii/48719044663.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376357/normal_604faf41f0169.pdfIn PDF document text
    • http://ecoservice-vlad.ru/jetotevcfz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422386/normal_605110ec9bbdd.pdfIn PDF document text
    • http://zevibeponakat.getenjoyment.net/23745993572.pdfIn PDF document text
    • http://bibivire.mygamesonline.org/rebegipesu.pdfIn PDF document text
    • https://cdn.sqhk.co/nobutowug/jcia7gc/sepekipitomosejebilarek.pdfIn PDF document text
    • https://cdn.sqhk.co/xogovofofi/jNHihhb/vabarojojoxomoxowevemotil.pdfIn PDF document text
    • https://cdn.sqhk.co/xevowuto/fjaiflM/sixefezilodirisakox.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
    • https://s3.amazonaws.com/lizuseguwix/79475367717.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/54594978117.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/how_to_crochet_magic_ring_left_handed.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/keurig_2.0_use.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d6a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A9 5100 bytes
SHA-256: 7050098f894a6592f473f12531b7387bc1aa273106577c56fb4c52d8068cb43e
font_01_sfnt_off0000e7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D5 2172 bytes
SHA-256: a1121b829e04df3d5a32807bcccba3a24360e33660c979c6f44c68fc23e5c1cc
font_02_sfnt_off0000f134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF134 11324 bytes
SHA-256: c77e0720a568d098e1a747d95830ef93688bbedd8ab32ef182071c01caf26d69
font_03_sfnt_off0001181e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1181E 16396 bytes
SHA-256: c33d2f67cc114b7d2d904a12bdb887090c9cf9d67046d89b020425dea864202e
font_04_sfnt_off00012dea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DEA 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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