Malicious PDF — malware analysis report

Static analysis result for SHA-256 534965952926b1b6…

MALICIOUS

PDF

76.3 KB Created: 2021-03-27 22:53:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 1cdcced3c6436c99bddbbefac1e6ae98 SHA-1: fb76d1e7c710150fb11c919a5965453076f8e525 SHA-256: 534965952926b1b66ef74484891e1decdf20b4297fc7f288382e1c4547b20de9
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan. It contains an embedded URI pointing to a suspicious domain, 'botokaw.ru', which is likely used to host malicious content or redirect users to a phishing site. The ML classifier also strongly indicated maliciousness, supporting the phishing and potential malware distribution intent.

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://botokaw.ru/aws?utm_term=which+is+better+liftmaster+vs+chamberlain PDF link annotation
    • https://divulonuwuw.weebly.com/uploads/1/3/1/4/131482828/8266525.pdfIn PDF document text
    • https://giruwikepu.weebly.com/uploads/1/3/4/4/134464081/6892473.pdfIn PDF document text
    • http://fobativ.mywebcommunity.org/41471118826.pdfIn PDF document text
    • http://zuregazezoral.mygamesonline.org/panasonic_cordless_phones.pdfIn PDF document text
    • http://gojavodevagajuw.mygamesonline.org/bargaining_for_advantage_book.pdfIn PDF document text
    • https://dojinutek.weebly.com/uploads/1/3/4/1/134108596/deliked.pdfIn PDF document text
    • https://nurosizakudagag.weebly.com/uploads/1/3/4/6/134699554/7436816.pdfIn PDF document text
    • http://nubilofanekib.mygamesonline.org/13917477856.pdfIn PDF document text
    • https://silujufadusume.weebly.com/uploads/1/3/1/1/131164496/1139718.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/13f1c6b9-ad41-4dee-a749-0aaa784d352c/nordictrack_ski_machine_repair.pdfIn PDF document text
    • https://3f46bf15-0a8c-4e80-b3e5-a2e3bf90e008.filesusr.com/ugd/8e6e76_f0e51bae5df44410af26041cd5733c45.pdf?index=trueIn PDF document text
    • http://radiviwix.onlinewebshop.net/the_national_interest_in_international_relations_theory.pdfIn PDF document text
    • https://45f61934-b4a1-4335-a9e3-e142d9465b5b.filesusr.com/ugd/0dd040_f3a958cc4d9b4d4d8d4c9fefa2c14287.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/85171f86-e854-4556-b8ab-83082a5e4b7e/diary_of_a_wimpy_kid_full_movie_the_long_haul_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/611ea7f0-ce94-4d8a-8ad1-849074993f1a/diary_of_a_wimpy_kid_movies_on_netflix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/413d26c9-f789-4142-a63c-97a5cf26f210/2537449921.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48115f5a-5791-4981-aa0f-7fcf73897608/ph_scale_worksheet_for_middle_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a4fd622-c92d-4451-8f02-c1da79fb8e65/advanced_organic_chemistry_syllabus.pdfIn PDF document text
    • http://fusozevukatamir.atwebpages.com/gejegofudimelumaso.pdfIn PDF document text
    • https://19508648-7f28-415f-8121-b57715dc1465.filesusr.com/ugd/9734e7_4253435f061b49208c42d87a6a2fe687.pdf?index=trueIn PDF document text
    • http://buwifojozoziden.atwebpages.com/cow_urine_therapy_for_cancer.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_off0000ece7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE7 5336 bytes
SHA-256: a236310b132b0d00fb64cef3da5ec82a62d55cf3651ea382af799b4a97884e08
font_01_sfnt_off0000fef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF3 10844 bytes
SHA-256: f851f3af1e6ee423fb48d3608f5778fa9b4b698726033f3f3681c4d7be7bbbd2

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