Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd39ec1d230b375e…

MALICIOUS

PDF

91.0 KB Created: 2021-03-25 03:44:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b6e609b0d0077f97e35e65954b7b411e SHA-1: 75d8a0a18a631bc1ed8cd86518622a24a6c23bc1 SHA-256: dd39ec1d230b375eefcb895f8e626b60bfe0279698dc3f9fbe12a24c5824318e
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 0.9998

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://jottigo.ru/wix?keyword=milady%2527s+standard+nail+technology+7th+edition+free+download PDF link annotation
    • https://cdn.sqhk.co/pevedapev/ZeijoCI/4003875619.pdfIn PDF document text
    • http://wipunemobak.mygamesonline.org/gre_test_prep_classes_seattle.pdfIn PDF document text
    • http://vimabanu.sportsontheweb.net/husqvarna_460_rancher_operator_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421056/normal_5fd0d5731d3d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464056/normal_600becabac29e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422144/normal_5ff60eab8de3a.pdfIn PDF document text
    • https://cdn.sqhk.co/jivazufevi/jjBhgid/will_castleminer_z_xbox_one.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459941/normal_604705994b741.pdfIn PDF document text
    • https://cdn.sqhk.co/dawadetugas/gbbPhbE/download_carx_drift_racing_2_mod_apk_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/wudawagirus/nhcgjCY/widovigomoboxolev.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/KiKgQgj/vibonafove.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456984/normal_6004a60495f08.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5fa60de5-32ab-41ac-ba65-77330e21e623.filesusr.com/ugd/2e16aa_f8d30686855c47899ef2fbae51757852.pdf?index=trueIn PDF document text
    • https://770ad53b-b55e-4e58-b1eb-3709f41304f7.filesusr.com/ugd/98e298_e0ceb705a347416ca40fad4584d1eace.pdf?index=trueIn PDF document text
    • https://f9fc249e-2e6a-4908-9eb0-88005465a50d.filesusr.com/ugd/2530ee_1fbb0b518ff74b3db04bbbeb7ad9d1c4.pdf?index=trueIn PDF document text
    • https://f579be4a-c2ec-451d-94ee-532237c06880.filesusr.com/ugd/9f6a24_e6728f2d337f4288975d6adf62a9a8fd.pdf?index=trueIn PDF document text
    • http://xemunebo.atwebpages.com/i_love_you_dont_leave_me_song.pdfIn PDF document text
    • http://zenakezogutomu.onlinewebshop.net/jufub.pdfIn PDF document text
    • http://beliraguw.onlinewebshop.net/chemistry_lab_materials.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_off00012350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12350 5596 bytes
SHA-256: 7daad053fc3fdd1e0a6cad1d542de2db0e587ee468ccb688ca8b227b9c4e129f
font_01_sfnt_off00013691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13691 11876 bytes
SHA-256: 8832bb9e30203d3172934abb345b8354bd66e91ff6d16ce7e5c455f57056216e

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