Malicious PDF — malware analysis report

Static analysis result for SHA-256 1df42d371cf9173b…

MALICIOUS

PDF

81.0 KB Created: 2021-04-08 05:30:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c16b13e3f99e9ff0506ff4a37ca12c47 SHA-1: 54c6029162c886a7b5e1fc0261050a6f98edb149 SHA-256: 1df42d371cf9173beb299768e66a9698c364371000b21aa5a93d636847dff835
126 Risk Score

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/123?utm_term=dryer+sheet+alternative+diy PDF link annotation
    • http://leaninrzpd.site/50568170754ecox6.pdfIn PDF document text
    • http://salonop.xyz/physical_versus_chemical_change_worksheetpfzck.pdfIn PDF document text
    • http://webpost.pro/zizelarakilotolodisiwamxbrsn.pdfIn PDF document text
    • http://creditstar-kabinet.com/various_prayers_lord_be_the_center_of_my_life_lyricscv8q9.pdfIn PDF document text
    • https://cdn.sqhk.co/popaxutu/hbieHn4/nuclear_war_2020.pdfIn PDF document text
    • http://opensalon.xyz/vicks_vapor_inhaler_cvsmpoeb.pdfIn PDF document text
    • http://policyhelpcenter.com/what_should_a_compare_and_contrast_essay_not_identifypwt2m.pdfIn PDF document text
    • http://7evenrp.ru/zombie_world_war_z_game_download6ndqt.pdfIn PDF document text
    • http://taforojujutusig.mygamesonline.org/sparx_catalogue_2020.pdfIn PDF document text
    • http://mekujoviwe.mypressonline.com/diabetic_neuropathy_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/wopidaxiwuk/jugihhd/jikizibu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lazuletezofik.onlinewebshop.net/wivilavisoruw.pdfIn PDF document text
    • http://tosurok.myartsonline.com/tovoridamugoditota.pdfIn PDF document text
    • https://ed0f7819-48b4-4c0d-9119-93de03d81b9c.filesusr.com/ugd/e481ce_9a66f56b0fc148dd8e64d0facd51aa17.pdf?index=trueIn PDF document text
    • http://zutugidod.onlinewebshop.net/norovijosufiwogelobararom.pdfIn PDF document text
    • http://xezaretidatoro.onlinewebshop.net/nilazaralimapedibugorof.pdfIn PDF document text
    • https://696f1bd8-06c3-47a7-a8f7-e83e17ec8d18.filesusr.com/ugd/5ad03d_1c3f8dc6bc524cddae394e35862f4c31.pdf?index=trueIn PDF document text
    • https://3a7b682b-4b85-4b21-836a-a34929c8735b.filesusr.com/ugd/0cd3a8_b10c2eb4a707427bab1173c6c01bbef2.pdf?index=trueIn PDF document text
    • https://5ce19dfa-329f-495d-88d1-e1e7834d9072.filesusr.com/ugd/d902bb_736c522618974a4eb3015d08a9fee4a3.pdf?index=trueIn PDF document text
    • http://limuzer.atwebpages.com/likipasixirepik.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5D 5076 bytes
SHA-256: ce9078f7fdbedcdd5cfe82a2c3c1d19793a07a78114b69ee4263726fb27d9048
font_01_sfnt_off0000fbae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAE 10864 bytes
SHA-256: b29bd1af15bba780b77531fec209bf530a6f2edcdbe5eed3416dcfc428dd6369
font_02_sfnt_off00012117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12117 16312 bytes
SHA-256: aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0

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