Malicious PDF — malware analysis report

Static analysis result for SHA-256 508033a4e40f423a…

MALICIOUS

PDF

68.2 KB Created: 2021-02-19 22:42:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 326a9c5455bd0a0577807723fd1e77b0 SHA-1: fb37d6a011c3d523171bb26d3c32f0afab73a75a SHA-256: 508033a4e40f423a5cfa3e942d7a6aa6847a5e3a4a436b5915381ba38ba42e0d
244 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=netmite+apk+free+download In PDF document text
    • https://nuwebobejope.weebly.com/uploads/1/3/1/4/131407692/rowar.pdfIn PDF document text
    • https://cdn.sqhk.co/sarunasol/dieRohe/zorerevujefisunefewa.pdfIn PDF document text
    • https://gopelema.weebly.com/uploads/1/3/4/3/134314553/loxap-zidisebefon-xedodoraxuxusa.pdfIn PDF document text
    • https://cdn.sqhk.co/pekotegafod/knhhDgd/3d_pink_heart_puzzle_instructions.pdfIn PDF document text
    • http://dizanuvusawowi.22web.org/boot_manager_premium_apk.pdfIn PDF document text
    • https://bazigumaxofiz.weebly.com/uploads/1/3/5/3/135383162/7565351.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvonusebex/i0rno5Q/chikungunya_vaccine_development.pdfIn PDF document text
    • https://wozukepob.weebly.com/uploads/1/3/4/0/134017809/jogar_wetofipitaduxiz_fejuluwopa_kirifomenipugu.pdfIn PDF document text
    • https://cdn.sqhk.co/sebutarukaw/ihiihcD/lusitelalisevivefuvin.pdfIn PDF document text
    • https://najunewuzerus.weebly.com/uploads/1/3/1/4/131408250/c69ce61.pdfIn PDF document text
    • https://cdn.sqhk.co/jizesusaxeta/dhhZgjI/tunojuwa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zixoridepub.rf.gd/cambridge_checkpoint_english_textbook_2_answers.pdfIn PDF document text
    • http://tezafafowajij.epizy.com/hachette_book_group_submission_guidelines.pdfIn PDF document text
    • http://suvowafavij.epizy.com/xuperidufusalefolom.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_off0000d0e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E2 5132 bytes
SHA-256: dd0e7959be1a7a8f6e3fc5de61d7f07e70ecea46a3d8d1f1b0cee985c0f8f2e2
font_01_sfnt_off0000e25f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25F 9916 bytes
SHA-256: 4eacf2dab4bf1071f59535882da33e875e90f5139863d6927d35e41286fc9e74

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