Malicious PDF — malware analysis report

Static analysis result for SHA-256 417cb10ae48155f8…

MALICIOUS

PDF

77.9 KB Created: 2021-05-28 07:16:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: de4715902cafb0a96d58d41270c35d6b SHA-1: 22e5612647876507e9fd74452c559d7d5f38785a SHA-256: 417cb10ae48155f80c11c34f3f914bf005e356cd28489be7565b8228c5c86f18
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/123?utm_term=chrysler+financial+payoff+information PDF link annotation
    • https://jinozotu.weebly.com/uploads/1/3/7/5/137507520/81f4214ef0.pdfIn PDF document text
    • https://panodetis.weebly.com/uploads/1/3/4/6/134669877/vilixulaxojar_dexetapop_gevuzikikiw_sagopivijazi.pdfIn PDF document text
    • https://kunatelifarak.weebly.com/uploads/1/3/2/7/132712072/junojovodefo-zofadotaseroda.pdfIn PDF document text
    • https://movamapipimopi.weebly.com/uploads/1/3/5/3/135303402/xuniwaliseweg.pdfIn PDF document text
    • https://gusobukenifoku.weebly.com/uploads/1/3/4/5/134525986/lexuvimobofadat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462985/normal_5ffd760c74b8a.pdfIn PDF document text
    • https://dinumaditu.weebly.com/uploads/1/3/4/4/134479473/wopab_dasirad_suzibibojawa.pdfIn PDF document text
    • https://poxunafit.weebly.com/uploads/1/3/5/3/135330231/7481807.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408187/normal_604420dce17f1.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/6f72d37d-95ce-453a-898d-2895d342d2d6/what_is_the_story_of_your_life_quiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b977b0d2-ff31-468c-b52c-17f90257b764/camp_chef_pellet_smoker_steak_recipes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b9102d1-31b1-492f-9693-e9e4bd6fc7d3/free_download_piano_sheet_music_a_thousand_years.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f369ff2-c64f-4d16-9a11-55a86a718513/yes_please_meaning_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6204f434-7d79-4402-94dd-8e3a9378f292/dr_seuss_book_collection_complete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21a2ecd9-bd15-4091-b911-33d8efbf67e3/ariens_snowblower_compact_24_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dac1519-ce16-4816-9477-73812d8c6ac5/signing_naturally_7-12_unit_8_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78c104c5-37cc-4bfc-a965-7877f3b798ea/summer_infant_gate_replacement_latch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d46906ff-656e-4ff6-915c-6675ed4a7d97/tadikesejuwiregede.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3169deda-e983-4b00-9296-4960bc4caff8/dirunewokexigujezo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8faf968e-fd5f-4246-9c45-dec5be88b4cf/laws_of_radical_exponents_and_give_examples_brainly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3235a60c-62bb-4925-98e1-1056a884ca6c/weekly_safety_topics_for_construction_site.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_off0000f0f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F5 5260 bytes
SHA-256: c9cfbde1675d3864b616ae17f30a8d73a6c8e6f92e4a0895ba65cf360f0ce6ad
font_01_sfnt_off000102b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B4 10956 bytes
SHA-256: 408e36a97823520faf889814551cce6f41b9cd3b8bb0898939baf5f6f3600a9b