Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e1070277b8077c4…

MALICIOUS

PDF

113.6 KB Created: 2021-03-23 11:49:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 516156b96dffb559d32f2ddb559793c0 SHA-1: 72353016c834ed0c789ac3c675fabb5ccdcaf721 SHA-256: 3e1070277b8077c4024ca4a91fee99f29b188f82685a3dab1fdafec3d37c71ce
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains a large number of embedded URLs, many pointing to unknown or potentially malicious domains, suggesting a phishing or link-farming attack. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating the PDF is designed to host many links on disposable domains.

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://resalured.ru/wix?keyword=bony+landmarks+of+femur PDF link annotation
    • http://bagomebefekixob.getenjoyment.net/nuretera.pdfIn PDF document text
    • http://rexonina.medianewsonline.com/titaditedumu.pdfIn PDF document text
    • http://tafuxasomup.getenjoyment.net/93504306358.pdfIn PDF document text
    • http://mevukavotidu.getenjoyment.net/56967744433.pdfIn PDF document text
    • http://dupuladusudired.mypressonline.com/beneath_your_beautiful_piano_sheet_music_free.pdfIn PDF document text
    • http://zagodutaf.getenjoyment.net/ikea_malm_king_size_bed_frame_dimensions.pdfIn PDF document text
    • http://nitiwomifigurod.mygamesonline.org/invertebrate_zoology_notes.pdfIn PDF document text
    • http://vumexovuvelafe.medianewsonline.com/mamiya_rb67_pro_s_user_manual.pdfIn PDF document text
    • http://panivupod.22web.org/begeferawizobiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8d8fffa-581e-4b0c-b58e-2561a160cedd/review_buku_the_power_of_positive_thinking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3b32ec4-6890-431f-9e67-5ab413eb7b6f/80944914964.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31fe57df-b439-4ed5-afc4-b68d41e3afe1/is_vw_maintenance_plan_worth_it.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd59cf9a-8713-4b4c-b2bc-9a6c244e95d9/lexekafazojo.pdfIn PDF document text
    • http://titesixa.rf.gd/nutafopav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caf90277-67a9-4cdd-a79a-a93b4aab8a17/because_of_mr_terupt_character_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d304acb4-9a7a-47a0-a0f2-fc9e5db43635/what_is_salesforce_in_simple_terms.pdfIn PDF document text
    • http://vagafalim.rf.gd/how_do_you_write_a_letter_to_a_soldier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c44b8b91-610f-4560-833a-e7cf195002ce/91093208890.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0736cce3-f536-4016-a439-13a31532bd12/how_to_clean_the_keurig_k_elite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c085d14a-24f1-4ba7-b9de-51d33451de84/minn_kota_trolling_motor_parts_amazon.pdfIn PDF document text
    • http://xejawaji.myartsonline.com/gasudenojigozuxij.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_off00017ca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CA6 5268 bytes
SHA-256: d3739fa47439ae60fe613b1cc37eabfbc4f110ab5127c93edaab5765b4c6094f
font_01_sfnt_off00018e88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E88 12936 bytes
SHA-256: 4f95d85fd06cd958298124efc3c759b5ccaeba166183452f7ebab21cbf7fd9ad

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