Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bcf3a893b71629f…

MALICIOUS

PDF

105.8 KB Created: 2021-03-05 08:50:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: a86f1a75232adcb74ec321143da17027 SHA-1: 2d9e298022861252ff160eaa53c3e2431679977a SHA-256: 2bcf3a893b71629fc14b41820141d4fdbffdde9d08f47854d22f8a76f3410c20
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains references to 'Dokkan battle jp apk 4.6.0', indicating a lure to download a game application, which is a common tactic for distributing malware or conducting phishing. No scripts were extracted from this sample, but the extensive link farm and malicious detection strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://resalured.ru/wix?keyword=dokkan+battle+jp+apk+4.6.0 PDF link annotation
    • https://cdn.sqhk.co/detazido/qigibif/89225462715.pdfIn PDF document text
    • https://cdn.sqhk.co/poxofufiko/gjd1e1G/jenovunikikisaruk.pdfIn PDF document text
    • https://pejifote.weebly.com/uploads/1/3/5/3/135348690/zuvekal.pdfIn PDF document text
    • https://vuzipelafow.weebly.com/uploads/1/3/4/6/134688966/badivazagefu_rafiporu_pomadu.pdfIn PDF document text
    • https://cdn.sqhk.co/polirorenu/cjfSZjh/toasted_sandwich_maker_with_removable_plates.pdfIn PDF document text
    • https://cdn.sqhk.co/xajamenujo/hgnhbig/grid_autosport_mod_apk_android_1.pdfIn PDF document text
    • https://badosajag.weebly.com/uploads/1/3/1/4/131407507/rutowexuzorizapezowo.pdfIn PDF document text
    • http://sevelorovuwo.66ghz.com/manjaro_linux_installation_guide.pdfIn PDF document text
    • http://tilosume.iblogger.org/to_kill_a_mockingbird_poem_about_scout.pdfIn PDF document text
    • https://cdn.sqhk.co/pamavunawi/idgfLCq/ataraxia_definition_pronunciation.pdfIn PDF document text
    • https://cdn.sqhk.co/votezevon/khaggYY/icy_veins_wow_classic_warrior.pdfIn PDF document text
    • http://ninuxalezopo.getenjoyment.net/how_to_deal_with_fear_of_intimacy.pdfIn PDF document text
    • https://bososotozakep.weebly.com/uploads/1/3/1/4/131437593/ea76b054ba7c.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/bhehjia/godul.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/b985521e-c3c1-456a-828a-e347d980b188/78758741593.pdfIn PDF document text
    • http://zaximibirada.epizy.com/pegituxofewusova.pdfIn PDF document text
    • http://namakanexir.atwebpages.com/pelonud.pdfIn PDF document text
    • http://pinininun.rf.gd/44258882742.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a04712bf-2503-4df7-b5f8-7d8bc6c155ec/how_to_use_sketchup_for_free.pdfIn PDF document text
    • http://mezexefobotero.epizy.com/chinese_new_year_sales.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
    • 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_off0000f00a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00A 26132 bytes
SHA-256: 26e8201dc85e9910c988151b70efdc47ef0b6f145bfc8e9d4160c72d9dfaa341
font_01_sfnt_off0001427f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1427F 5236 bytes
SHA-256: 4c8e623f70b70cc6ca45e01768002c20df471926d3afe2bf4c933a914476cd87
font_02_sfnt_off00015475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15475 14720 bytes
SHA-256: 8b2577d4514c1eb4005d4550ca528fb7484a5bc51a284c738e43ea59879905a8
font_03_sfnt_off000182fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x182FE 16420 bytes
SHA-256: b962b279c6b5a181fd5d7f48e6a410d4277cc9890754f33e6777fead99768935

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