Malicious PDF — malware analysis report

Static analysis result for SHA-256 745846f25aec7125…

MALICIOUS

PDF

86.7 KB Created: 2021-03-10 01:35:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: d8da518d46e6093ddd0d4bc622d2da6e SHA-1: 458dbdd8d76b2550b1d1a37108b2c3625d721d41 SHA-256: 745846f25aec7125b6959018bb3bc99201310aa135d67fbc67061d85247fbeed
126 Risk Score

Malware Insights

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

The PDF contains multiple external URLs, with one identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://lozipotod.ru/123?utm_term=information+about+diorite+rock PDF link annotation
    • https://milakixu.weebly.com/uploads/1/3/1/4/131483020/3836f539b289bdb.pdfIn PDF document text
    • https://vajudufebebugi.weebly.com/uploads/1/3/4/6/134696622/jogenaruw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448341/normal_5fe3e28ca4a26.pdfIn PDF document text
    • http://fegivate.medianewsonline.com/long_john_silver_meal_deals.pdfIn PDF document text
    • http://operationhomeplate.com/597093971020ww0t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459320/normal_6047f5dac78f5.pdfIn PDF document text
    • http://pagavopalubutu.scienceontheweb.net/frigidaire_dishwasher_reset_timer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366034/normal_5ff9bed6db157.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/kenmore_elite_he3_washer_error_code_f35.pdfIn PDF document text
    • http://astrohelp.space/708419708327g62d.pdfIn PDF document text
    • https://zuwumepegowivos.weebly.com/uploads/1/3/1/0/131069935/vokusumasup.pdfIn PDF document text
    • https://kuduxuke.weebly.com/uploads/1/3/5/3/135323303/vegenixiran-fuwota.pdfIn PDF document text
    • http://ital-girl.space/61713987702htldq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414498/normal_60165526bdcd4.pdfIn PDF document text
    • https://toxoladosa.weebly.com/uploads/1/3/4/4/134479392/tasof.pdfIn PDF document text
    • http://brettlockhart.com/bloons_monkey_city_ddt_strategyiqa8e.pdfIn PDF document text
    • http://zanovekolasin.mywebcommunity.org/how_to_learn_the_music_industry_in_nigeria.pdfIn PDF document text
    • http://sigisuzuk.getenjoyment.net/how_to_connect_jlab_sport.pdfIn PDF document text
    • http://gufutaca5.xyz/levutitizogjwsnk.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/c9a3b18d-d74a-4e2d-a437-c26de4a050b2/reaccion_de_combustion_del_buteno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1590e48-b9ec-4ce1-87f6-cdd473dab7d9/maladusalowimutinivenabu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/156f5254-fd42-47fc-a340-c33ebc4603a6/gomigafojukev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddf19f36-28b2-4cda-b386-116b442f8678/zimuwu.pdfIn PDF document text
    • https://df1882fa-13c5-42f1-8438-577935b594b9.filesusr.com/ugd/91932b_eb1310f30aba4a15aff93fb558f5bc88.pdf?index=trueIn PDF document text
    • https://f730d15c-1921-46d2-b6d4-288333e40990.filesusr.com/ugd/e2c223_e39bce0985dc4ef9bbfa34be349c6962.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_off0000f794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF794 2960 bytes
SHA-256: 3c6502e04658d985b37ed967139d4b1bb7136c1c8ff06868e6b64c17630b7d50
font_01_sfnt_off00010217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10217 5100 bytes
SHA-256: b0a865d483338017a26a879506d61611d8b76587800b915a1222af6193d3c356
font_02_sfnt_off00011358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11358 10680 bytes
SHA-256: d0f36137e1130f4e71a3da3ae6b8a0c555b6f5143a0c1b16b40a30d560cf4327
font_03_sfnt_off00013822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13822 16036 bytes
SHA-256: 354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb

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