Malicious PDF — malware analysis report

Static analysis result for SHA-256 f46454ad3bfccd6e…

MALICIOUS

PDF

76.0 KB Created: 2021-03-17 13:29:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76167265018c1774d0ffd36d71c347cd SHA-1: 943cf5ebe02628f12b81782b8a1f6aeb1ab2ec9d SHA-256: f46454ad3bfccd6ee387d40a161198f2ac3933715dc93ba37deb326311757960
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary URLs, 'https://maypoin.ru/wix?keyword=aptoide+tv+apk+file+download', suggests a lure related to software downloads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure points to a malicious document designed to redirect users to other potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/wix?keyword=aptoide+tv+apk+file+download
    • https://cdn.sqhk.co/bapisolel/jhgfhiB/ping_pong_table_cyber_monday_deals.pdf
    • https://cdn.sqhk.co/benanejufa/zGhbXgi/fojopejigi.pdf
    • https://cdn-cms.f-static.net/uploads/4417808/normal_603bf3cd719d0.pdf
    • https://cdn.sqhk.co/ligilitojob/V5Difgi/limanadenerigotesom.pdf
    • https://cdn.sqhk.co/kufejeni/PghaUja/nostalgic_definition_urban_dictionary.pdf
    • https://static.s123-cdn-static.com/uploads/4377912/normal_5fc59fdace4bd.pdf
    • https://cdn.sqhk.co/tororukiwuri/ibiijhn/street_of_rage_2_rom_hack_download.pdf
    • https://jugurapofan.weebly.com/uploads/1/3/4/3/134339640/mekojuji.pdf
    • https://static.s123-cdn-static.com/uploads/4501963/normal_5fdfca71b38b5.pdf
    • https://mozufidapu.weebly.com/uploads/1/3/4/0/134012608/mupemekexofil.pdf
    • https://voximarabot.weebly.com/uploads/1/3/1/3/131383255/zogenomug_vumunop_sufijupeg.pdf
    • https://cdn-cms.f-static.net/uploads/4461484/normal_5fda8ace9bd08.pdf
    • https://nubeboganiroj.weebly.com/uploads/1/3/1/3/131384383/338dcf5b0faa.pdf
    • https://cdn-cms.f-static.net/uploads/4389354/normal_6035afaa00ca8.pdf
    • https://damemerivojed.weebly.com/uploads/1/3/4/3/134378109/gitidojujanef.pdf
    • https://cdn-cms.f-static.net/uploads/4477878/normal_5fd9453a53d06.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mudurixo/valkyrie_drive_bhikkhuni_trophy_guide.pdf
    • https://s3.amazonaws.com/bejikefowu/bandwidth_test_software_free.pdf
    • https://s3.amazonaws.com/viromibukoleliw/boxoxogalumafozopir.pdf
    • https://s3.amazonaws.com/jezobasit/54156662488.pdf
    • https://s3.amazonaws.com/fopalew/18016260047.pdf
    • https://s3.amazonaws.com/zetituri/what_is_the_main_purpose_of_punishment_to_students.pdf
    • https://s3.amazonaws.com/lusabifef/how_to_remove_the_drain_plug_from_a_garbage_disposal.pdf
    • https://s3.amazonaws.com/wejuvono/california_adventure_park_map.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e20e.bin
b0cd115b4b5ad6008fd3fbdb792fd5b6d7b7fb28c705e5190e4e19b0cae2939d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE20E 4968 bytes
font_01_sfnt_off0000f32b.bin
6251d04656a4fdb1c0ae313608dcf0bb40c9106ec87909ba441e29362acf59fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF32B 19684 bytes

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