Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a82b171cb4c79d…

MALICIOUS

PDF

89.2 KB Created: 2021-03-21 02:26:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 2ab8c3a8cdec24ab945766ab99292764 SHA-1: 30688f715019564e46eea3a44cf44cd27f04b8f8 SHA-256: d2a82b171cb4c79dbdb14d83096eb7a61049ebec2a2daad11d8a51e44e699cd9
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The primary heuristic firings point to the document acting as a link farm, containing numerous external URLs, many of which are hosted on disposable domains. The embedded URLs suggest an attempt to direct users to a network of sites, likely for SEO manipulation or to serve further malicious content. No scripts were extracted, but the PDF structure itself is used to host these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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://gimoguvi.ru/award?keyword=political+marketing+pdf+journal PDF link annotation
    • https://fevowavekotaxuw.weebly.com/uploads/1/3/4/6/134635114/wudowi_lukov_fimen_zenobegem.pdfIn PDF document text
    • https://cdn.sqhk.co/linaxezo/chd8hdb/alita_battle_angel_ova_english_dub.pdfIn PDF document text
    • https://cdn.sqhk.co/laxiroroweno/jc88E1U/direct_labor_cost_formula_managerial_accounting.pdfIn PDF document text
    • https://dikemogegopur.weebly.com/uploads/1/3/1/4/131406608/zuvasezobiteb_vekixeramejub_pabodirexe_wopawaxedesuluk.pdfIn PDF document text
    • http://gizovivomiz.getenjoyment.net/xajuv.pdfIn PDF document text
    • https://cdn.sqhk.co/papazokixe/ia2hajb/breach_and_clear_android_play_store.pdfIn PDF document text
    • https://fegowudabe.weebly.com/uploads/1/3/1/4/131438077/7809147.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/QjfWbjg/lemon_cupcakes_cake_mix_with_pudding_recipe.pdfIn PDF document text
    • https://jetorijeroxu.weebly.com/uploads/1/3/4/6/134693882/00aa159b49.pdfIn PDF document text
    • https://mogufujekomepit.weebly.com/uploads/1/3/1/6/131607600/098fa51.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://uploads.strikinglycdn.com/files/557e3f7a-0d00-4f28-9694-d1a254948aa2/47754644615.pdfIn PDF document text
    • https://s3.amazonaws.com/nagudo/inspector_general_s_report_on_whistleblower.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf856e76-9a50-4673-b91e-1e5b9b7e3f38/70448687833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c29bf975-fcbd-4630-88fb-7bc23e103c02/death_cure_plot_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56b74211-e915-4b3e-9fad-7293bf61fe95/intellichlor_ic40_reset_button.pdfIn PDF document text
    • http://nakarajibap.myartsonline.com/how_to_replace_a_ge_mwf_refrigerator_water_filter.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/william_bramley_gods_of_eden_wiki.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/28275453809.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/493207c0-d2aa-4f70-aa85-324328b92928/cuntos_tipos_de_medios_de_comunicacin_hay.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/vodijiguzoxupiwebapebaz.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E9 4100 bytes
SHA-256: 239c96c40c51172e133e1971f98d5e17e99bab7fb8d3e508ddabc204b379a28d
font_01_sfnt_off00011070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11070 5320 bytes
SHA-256: 49b85bf4ccfa6297b1a4392f11d4edb5227f6063dc533ee7997004bfb9a58eca
font_02_sfnt_off00012274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12274 11992 bytes
SHA-256: 938a942d6d054956b67932e7a9eb9c86f4984b908c06a172862518ad203f5c73
font_03_sfnt_off00014916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14916 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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