Malicious PDF — malware analysis report

Static analysis result for SHA-256 d575a7fca2eaae5a…

MALICIOUS

PDF

75.0 KB Created: 2021-06-06 07:07:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: bce1f64781a861ce799e3c4d810ae644 SHA-1: a8a3310eb52c81603f589caf8a2413785e0865f1 SHA-256: d575a7fca2eaae5a70e90f432e226b6a5efa3a1fb1d72f448b853e40b7b550f9
186 Risk Score

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 phishing or malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The document body, though heavily obfuscated, contains text related to playing a game on PC, which serves as a lure to direct users to these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://wastran.ru/pbw?utm_term=how+to+play+marvel+future+fight+on+pc PDF link annotation
    • https://kudiwugeditonaf.weebly.com/uploads/1/3/5/9/135964520/3375249.pdfIn PDF document text
    • https://getesedalo.weebly.com/uploads/1/3/4/6/134629657/d65a3c4.pdfIn PDF document text
    • https://gefawopunov.weebly.com/uploads/1/3/0/9/130969454/purekadaniper.pdfIn PDF document text
    • https://tekoxinir.weebly.com/uploads/1/3/4/6/134606092/nitora.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380078/normal_60103f581d4a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482860/normal_5fe9c9d0731f0.pdfIn PDF document text
    • https://xexibufit.weebly.com/uploads/1/3/0/7/130739933/3332e9b7cec.pdfIn PDF document text
    • https://femomupine.weebly.com/uploads/1/3/4/4/134458898/toravisajupara.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/ae8815f1-fdf6-41d2-ae66-ba7c7bb66894/how_to_clean_dr_brown_straw_cup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f3efa6f-c206-4628-82a2-150f894026b1/crema_para_la_cara_reseca_y_escamosa.pdfIn PDF document text
    • http://gegoxelaw.pbworks.com/w/file/fetch/144596547/the_sims_4_mod_apk_data_offline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67779422-d8c3-4808-8cd5-29bbe6355c1d/taxikewekubijul.pdfIn PDF document text
    • http://lekipirunezi.pbworks.com/w/file/fetch/144582723/gta_5_premium_online_edition_how_to_redeem_money.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d26ea6a6-a895-4d3d-86c0-3b4cdf1c1054/hoover_windtunnel_filter_uh72400.pdfIn PDF document text
    • http://xedidovetaw.pbworks.com/f/quantifiers_countable_and_uncountable_food_exercises.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB9 3088 bytes
SHA-256: ec699af6de8e804703fe0e0b44d6cbefbd5885043673cb0a1be6702b4ed52325
font_01_sfnt_off0000e7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C0 5468 bytes
SHA-256: a34e4c3bcb1259a741198ae0b6846990fdbde75a14b9eb518755ffe9951b96d9
font_02_sfnt_off0000fa50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA50 10620 bytes
SHA-256: 831672b0258e5ad5b15c960a48cb47f2e4f307b035c4419edd39a2e4b7945287

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