Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab4543efc92f229e…

MALICIOUS

PDF

73.4 KB Created: 2021-03-12 15:13:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 80c70b54b2bbe88bfffe70b397308201 SHA-1: 9494720322710909bdd1ffa4411fa2637641f2d6 SHA-256: ab4543efc92f229e14ffd6e959f9ceb2e879184425fa9f82267394f5ec4a032f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains an embedded URL that leads to a domain associated with a link farm, suggesting a phishing lure. The document body, though heavily obfuscated, contains text related to 'profit and loss report format', reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/123?utm_term=profit+and+loss+report+format PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470209/normal_6043613fe7b58.pdfIn PDF document text
    • https://cdn.sqhk.co/pinepopowig/fan0B2u/mario_kart_tournament_prize_money.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407994/normal_600feaa144dfb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408186/normal_5ff090add95d0.pdfIn PDF document text
    • https://cdn.sqhk.co/wirumedaba/51hghcX/las_vegas_national_golf_course_map.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvetuzaxi/CjcnGij/patejido.pdfIn PDF document text
    • https://cdn.sqhk.co/soxemudu/kVlFRa7/employee_handbook_template_acas.pdfIn PDF document text
    • https://cdn.sqhk.co/baxoladipezu/hj6ggm6/best_ps1_emulator_for_windows_10_download.pdfIn PDF document text
    • https://cdn.sqhk.co/givogaduta/Ik3jiuq/wufusipeneromifimuzepo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e966359d-176b-477a-9ad9-c314bea94227.filesusr.com/ugd/fa6f14_b6c36ac2511d4dc49ffe2cf727d0ef9b.pdf?index=trueIn PDF document text
    • https://b32521b7-32ca-447e-9967-d27d0dce683d.filesusr.com/ugd/800b88_0dcb058566a24ea38c848575acd120d4.pdf?index=trueIn PDF document text
    • https://c1f973cf-d719-4acb-8f9e-cd83ae4fb94d.filesusr.com/ugd/057766_a39ff7ffb62b4126997c4c97f8e7dac8.pdf?index=trueIn PDF document text
    • https://6bc553e5-d0de-4278-827a-c77c8eb32fbd.filesusr.com/ugd/4a6c57_08c4a7aa168449b68b033453f0537d88.pdf?index=trueIn PDF document text
    • https://cb6d8354-940b-4e05-9f1d-0150973ab277.filesusr.com/ugd/882da0_23033831d6a14e7eb41e8e5e42502328.pdf?index=trueIn PDF document text
    • https://6f4861c6-cdf0-4a5f-ba2d-f9c5e5bfbee6.filesusr.com/ugd/77941b_a12cc36e4e304a499480f7d3d98ff8af.pdf?index=trueIn PDF document text
    • https://7095e710-59ac-4d27-8a5a-f3bbcaf65deb.filesusr.com/ugd/418e76_f584af60cdd44f63a84bbdfd62b511cf.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c6f92ef-384c-438a-b365-f326eda14129/aroma_20_cup_rice_cooker_inner_pot_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61752168-de06-40c8-b9fa-40eec8aa6a46/dujesod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9e11df8-0eda-412a-9ac0-23335b09a535/2106964669.pdfIn PDF document text
    • https://d9226533-59f4-4737-ae77-cfa9cdee5378.filesusr.com/ugd/d7c203_6b7014ae88d94227bdd6ffd3b879552d.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A3 5188 bytes
SHA-256: 8d70665a38b5772d1d3102aa9a0ffab6e6296f8c10d430d85c6a85009e1f4bd8
font_01_sfnt_off0000f438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF438 10636 bytes
SHA-256: e32ca0bb14f3d3e26d0fb8a37c9790e8de3662aeb76dc4e0d038951f8f161a40

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