Malicious PDF — malware analysis report

Static analysis result for SHA-256 26cdfaa1f27afb9c…

MALICIOUS

PDF

139.3 KB Created: 2021-03-08 18:47:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 14b85a34f640c1243ba3d6694bd3a55c SHA-1: a6cf9aedfd5b3ff735ac487497a105227bb036c5 SHA-256: 26cdfaa1f27afb9ca354aaa8cc0ad335812c4774a8f148671be9206670a3276d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and one specifically lures users with a search term related to 'Final Fantasy 7 remake pc release date steam'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9749

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://nipisod.ru/strik?utm_term=final+fantasy+7+remake+pc+release+date+steam PDF link annotation
    • https://cdn.sqhk.co/ralofobo/gdz41WA/heart_nta_online_application.pdfIn PDF document text
    • http://ranupila.mywebcommunity.org/76451292355.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444356/normal_602450f0b8d47.pdfIn PDF document text
    • https://cdn.sqhk.co/notenirikev/gc7hhWW/skipping_rope_weight_loss_before_and_after.pdfIn PDF document text
    • https://cdn.sqhk.co/wexovezojab/iAthagg/fonapobizez.pdfIn PDF document text
    • http://sepoxudozixo.sportsontheweb.net/linking_words_adding_information_examples.pdfIn PDF document text
    • http://fepaporipevari.mypressonline.com/fifunugivajobetedox.pdfIn PDF document text
    • http://dupuladusudired.mypressonline.com/anyone_can_whistle_script.pdfIn PDF document text
    • https://cdn.sqhk.co/jisokemefaz/sZlIyjj/xifepo.pdfIn PDF document text
    • http://fubozibir.iblogger.org/alan_carr_easy_way_to_quit_smoking_reddit.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/hfTYIge/sugamabowuti.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468554/normal_5ffdc7fb2029f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470692/normal_5fcbfe25e5cd2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388282/normal_5fec9ae087580.pdfIn PDF document text
    • http://dogolojowazovuf.iblogger.org/kinipisul.pdfIn PDF document text
    • http://jipetabonitu.mywebcommunity.org/pamefozelodadegoni.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nizowozutagele.atwebpages.com/94466824759.pdfIn PDF document text
    • http://gawebunopom.rf.gd/citroen_c5_exclusive_2009_manual.pdfIn PDF document text
    • http://tepaduvofevog.rf.gd/how_to_use_instant_pot_duo_nova_as_a_slow_cooker.pdfIn PDF document text
    • https://4eb83289-b313-4542-b68c-79a1d4783db4.filesusr.com/ugd/f6336d_7d771aa0f6ef489cb08eb4d33fda677f.pdf?index=trueIn PDF document text
    • https://8271b8e8-1520-4b18-8785-2fafc8cd33e6.filesusr.com/ugd/efc97f_4eeb412c261e463fbd1ec73ecd73286f.pdf?index=trueIn PDF document text
    • http://labopum.rf.gd/oxford_grammar_book_for_class_8_answers.pdfIn PDF document text
    • https://26577e91-18e8-42c3-8e85-49dcca1d6605.filesusr.com/ugd/195787_806afa4f9f00400b9757c0ff7e5728c6.pdf?index=trueIn PDF document text
    • http://jitawidavez.atwebpages.com/6394886990.pdfIn PDF document text
    • https://03aaa7dd-6608-466c-a68c-f41c59811c05.filesusr.com/ugd/ae15ca_93745d3b21cf4d419769b7c151d6dbe6.pdf?index=trueIn PDF document text
    • https://e510c2d5-567e-4a96-89ff-abc18316baf7.filesusr.com/ugd/8a9bcc_3f5ef8851737466c8ddc62953ba122ef.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A342 12608 bytes
SHA-256: 3c95c20d3badea27c28377a201c53679f10b0b22ff1269d7c0d31adde8495b86
font_01_sfnt_off0001cd48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CD48 5504 bytes
SHA-256: 07b072c447093a5d4345377c106deaf97a0501f5e8c9645b62103aa1485cd502
font_02_sfnt_off0001e005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E005 12044 bytes
SHA-256: 074b99c6447b1539426dff299f4576be113142db0e6bf00519d1839fc62def46
font_03_sfnt_off00020881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20881 16344 bytes
SHA-256: 7e0863d6dcdfe3ce59f67395a06e5e8634226e44f713773c85e494ff6d119ee1

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