Malicious PDF — malware analysis report

Static analysis result for SHA-256 a873648dc44c704e…

MALICIOUS

PDF

81.1 KB Created: 2021-04-04 05:54:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 06df1bb39765c844a8a69293962f8b52 SHA-1: f7350ec5c363c65371a6b495863183e3d1fe30d2 SHA-256: a873648dc44c704ec142784a6f02eb0400e3d919038433a5f08bbdca017dbf96
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to a domain known for malicious activity ('botokaw.ru'). The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/123?utm_term=heaven+on+high+floor+30+boss+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405184/normal_605a3b51b720d.pdfIn PDF document text
    • http://everydayy.fun/titebogokasojugolasasukef3w4l.pdfIn PDF document text
    • https://cdn.sqhk.co/rudolikube/Xjj9ieb/college_basketball_3_point_line_dimensions.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374211/normal_600cbb5d96322.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407733/normal_604eed18ae4e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382789/normal_5fff5f7015c63.pdfIn PDF document text
    • https://cdn.sqhk.co/xibetevoxaj/b3hegd6/minecraft_more_mobs_mod_1._12_2.pdfIn PDF document text
    • http://nigma24invest.online/visual_basic_excel_for_beginners14na0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490934/normal_605fab7393555.pdfIn PDF document text
    • http://homearfes.com/xokepopanis6fy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472503/normal_5ff37c637dfc7.pdfIn PDF document text
    • http://gnfcns.info/17845015996myuw6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460982/normal_600d266e24ec2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481509/normal_5fc6b0f70f05e.pdfIn PDF document text
    • http://idealica-official.website/253816913023tjn2.pdfIn PDF document text
    • https://cdn.sqhk.co/pitekofotada/aXjiyha/2_in_1_air_hockey_foosball_table.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jezosimo.epizy.com/bigekeminesupusaza.pdfIn PDF document text
    • http://soxekig.epizy.com/dsm_5_bipolar_disorder_criteria.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/datadedosoxixaganu.pdfIn PDF document text
    • http://depuniwawugupi.epizy.com/mds_3.0_medicare_discharge_assessment.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/ponniyin_selvan_movie_cast.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/fishing_report_san_diego_piers.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/74660822948.pdfIn PDF document text
    • http://betiwewis.rf.gd/over_the_rainbow_composer_clue.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/catalogo_mary_kay_marzo_abril_2018.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_off0000fdd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD2 5636 bytes
SHA-256: 4c6620e4b44bc4e6f140064b2c01fc105badeacd124970c19a8ca72c798b6bf2
font_01_sfnt_off000110f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F7 11200 bytes
SHA-256: 3f84b14dc02c6ca43eb76b5efb61d5edc72cde98d34dff3cdd5c164a1530eb7a

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