Malicious PDF — malware analysis report

Static analysis result for SHA-256 e64304de22f105c3…

MALICIOUS

PDF

76.3 KB Created: 2021-03-05 18:30:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e66f720121b96092d9692a600a77cdfc SHA-1: d661cbc273ab9580de8ebd751b26d638fcf79fc7 SHA-256: e64304de22f105c36dbc43e8bb8ad686f6d87479d821be5a28859de5e04a5d3d
186 Risk Score

Malware Insights

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

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 0.9952

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/strik?utm_term=como+bajar+musica+de+youtube+gratis+al+celular PDF link annotation
    • http://dosaxixapaxa.medianewsonline.com/36984546290.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477181/normal_5ff141324e7a5.pdfIn PDF document text
    • http://ig-verifiedsbadge.com/388311372643isul.pdfIn PDF document text
    • https://fiwadevu.weebly.com/uploads/1/3/4/5/134592392/fixovubeleta-wevubagalexa-nunusuwezo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385217/normal_5fd640372d541.pdfIn PDF document text
    • http://volulolusawaz.mygamesonline.org/what_is_meant_by_loosening_of_associations.pdfIn PDF document text
    • https://nemabofafuz.weebly.com/uploads/1/3/5/3/135389169/5360377.pdfIn PDF document text
    • http://topsale.pro/boat_conformation_axial_equatorialkm1r8.pdfIn PDF document text
    • https://beperupofifu.weebly.com/uploads/1/3/1/6/131636755/9545974.pdfIn PDF document text
    • http://zugapuvu.mywebcommunity.org/fonoruwus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448743/normal_602979cddae9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388825/normal_602f36ddaf114.pdfIn PDF document text
    • http://pasetbs.xyz/guns_germs_and_steel_audiobook_free_online86sqd.pdfIn PDF document text
    • http://marketeuro.pro/sword_art_online_ps_vita_games_in_orderhgqgx.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/does_vroom_negotiate.pdfIn PDF document text
    • https://vurerabekude.weebly.com/uploads/1/3/4/4/134493837/gumurikexezupuf.pdfIn PDF document text
    • http://zopokujejisolan.getenjoyment.net/10544734744.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://b2d1eea7-aef5-47fc-962c-88b5513ecafc.filesusr.com/ugd/3a57bc_ea727c1db0ea40d29bd488135bffa9be.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/16860a56-ea86-4648-a2a3-bcd301dfb7ce/the_andromeda_strain_book_plot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef3c27ae-c791-4e69-a0b9-22383429f3ae/37797832049.pdfIn PDF document text
    • https://67bb8873-ca08-4da4-87c0-60a8072ebff6.filesusr.com/ugd/a838c0_d9b990c8f4614cf98f0053fb99c83171.pdf?index=trueIn PDF document text
    • https://1b15a19f-c8c2-4d9d-8c2f-e97aa7ecfe2c.filesusr.com/ugd/eb6c48_7cdf94e6df3647f983d02241b6cf1550.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5fce23c-dc7b-42e7-a465-02a2ffd749fc/shimano_nexus_8-speed_service_manual.pdfIn PDF document text
    • https://8d40832c-2e2b-4284-8151-bb35a16d80ac.filesusr.com/ugd/05d014_f3e45d319a0e4e2db5d9aeb581ce8b36.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b3f2869-3ba5-4448-ade5-37bc93072a0b/28687182780.pdfIn PDF document text
    • https://f6180879-d31b-499c-8e42-fead7842c491.filesusr.com/ugd/007227_f1fcdc4b9d304e8fa7f439fc372d2907.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC86 5376 bytes
SHA-256: f5d4455f28b08eca369155041bcdd241acfb2b4d81a55e98da144628569032fa
font_01_sfnt_off0000eedf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDF 11104 bytes
SHA-256: fe4c41d620a6d33ae6e6665a54dcc517dcd13b705a99ce5e3e7dac02c75867b4
font_02_sfnt_off00011323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11323 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176