Malicious PDF — malware analysis report

Static analysis result for SHA-256 f70554d84b3f29d4…

MALICIOUS

PDF

88.7 KB Created: 2021-03-05 09:27:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 52d7635cc5b79863ad4f3e505ae443b6 SHA-1: 408ee6f27142d6d2fa3569da597716872eca5ded SHA-256: f70554d84b3f29d43df84c7cd2ccd5aa1d1d33eb426da08221d09aee17687595
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a significant number pointing to disposable hosting and potentially malicious domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm, suggesting a malicious intent to distribute or redirect users. The ClamAV detection and ML classifier further support the malicious nature of the file, likely serving as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/award?keyword=robin+hood+prince+of+thieves+duncan+quotes PDF link annotation
    • http://ladekepevij.mygamesonline.org/how_to_pair_sony_bluetooth_speaker_with_iphone.pdfIn PDF document text
    • http://timecodes.net/404830804135hg61.pdfIn PDF document text
    • http://pimifawimonidij.mywebcommunity.org/samsung_printer_not_printing_multiple_copies.pdfIn PDF document text
    • http://repochka.site/73317850938oj1ml.pdfIn PDF document text
    • http://wisecreditscore.info/sexefofabad0zuix.pdfIn PDF document text
    • http://tulavesew.getenjoyment.net/operations_management_heizer_chapter_10_ppt.pdfIn PDF document text
    • http://togezapavux.iblogger.org/avast_cleanup_premium_key_android.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/10b49757-a077-4c15-8fab-31ea9f527983/where_the_wild_things_are_song_alessia_cara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dac93a8b-6717-425e-8dd4-8f4532c9ecf5/xilufatepunubawivo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd3b9c7e-869a-4a9f-aad3-882bf1f195bd/4788325098.pdfIn PDF document text
    • http://kosezofejesuxef.atwebpages.com/ribuwoli.pdfIn PDF document text
    • http://marelifi.rf.gd/bluetooth_range_extender_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ab139a5-cc15-4cef-8d5d-450cde36faaf/44047055959.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4263c55a-7d0e-4b91-aa7f-cd554a33dc72/how_long_is_jail_time_for_awol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d41f54ae-5794-49bb-ad94-051cc2938a8f/1997_polaris_magnum_425_4x4_value.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd07318e-5aa7-47c0-a796-c031ef29a938/how_long_to_study_for_actuary_exam_p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2a8affd-bae3-40c6-813f-46c2106e7a82/lojonekowod.pdfIn PDF document text
    • http://sirovorisolilu.rf.gd/32413357953.pdfIn PDF document text
    • http://wosumobikufiw.rf.gd/73035559823.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/343a99e4-0635-47b1-9631-c9f9f9efb77c/11780863737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f91af2c-5201-4f67-b1a5-582bbb98f50c/dbms_stats.gather_database_stats_estimate_percent_dbms_stats.auto_sample_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21ef7f89-1cb2-4471-b193-7c0a29b6200f/dufezuxanuxal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e58ecc3-fe9c-4c0b-88ff-97e7409bdb47/dd_3.5_favored_soul_handbook.pdfIn PDF document text
    • http://boripodadup.epizy.com/9154672107.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c76b1955-e205-4b54-9218-3c513091f010/dizawodasimonefotazagafo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E68 5544 bytes
SHA-256: b88f74bdc0ba34c8c9ab6cefd5de394400915faa3cb3f8ab28a4faae5ed9b1b7
font_01_sfnt_off0001313e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1313E 10468 bytes
SHA-256: 920647e100f5ff9d718b4ef14aad6442c081fc2f89efb90e1cd5eca1649640c6