Malicious PDF — malware analysis report

Static analysis result for SHA-256 d571fa6385be8399…

MALICIOUS

PDF

92.7 KB Created: 2021-03-05 02:52:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 07daf24de04c400c01ad32254c01de1f SHA-1: 915231987f1c508167ec62510e3a9b07ac2fe12f SHA-256: d571fa6385be83994c411de1815b551b0aa1996ebf6b719a5ee8504dd926bfd3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9990

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://xajibur.ru/123?utm_term=how+to+pair+jaybird+bluebuds+x+with+iphone PDF link annotation
    • https://cdn.sqhk.co/xogatijixe/Giimjfd/2864129804.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491673/normal_6009d0c5bb008.pdfIn PDF document text
    • http://wedavinonuvovu.22web.org/ludafibumikufodaxozada.pdfIn PDF document text
    • https://ligelonajoka.weebly.com/uploads/1/3/1/4/131407163/xojotifude.pdfIn PDF document text
    • https://cdn.sqhk.co/rekubapapup/gehbIaE/16554451591.pdfIn PDF document text
    • https://jufufowepum.weebly.com/uploads/1/3/5/3/135348100/vexeputavutut.pdfIn PDF document text
    • http://xidasetetobuge.scienceontheweb.net/vezivologetobagebok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391624/normal_5fefbaf7ce92b.pdfIn PDF document text
    • https://nigokozop.weebly.com/uploads/1/3/4/4/134436215/9577096.pdfIn PDF document text
    • https://cdn.sqhk.co/gixezovof/70piiQE/get_lucky_mark_knopfler_guitar_chords.pdfIn PDF document text
    • https://fatibetoliwan.weebly.com/uploads/1/3/4/7/134731660/2734476.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453334/normal_5fecf8287a5cd.pdfIn PDF document text
    • https://cdn.sqhk.co/xowuzaseku/R1K8Rvv/call_me_emperor_ministers.pdfIn PDF document text
    • https://rabizelen.weebly.com/uploads/1/3/1/4/131453176/c80330271e0.pdfIn PDF document text
    • https://cdn.sqhk.co/zozijawutuxu/chghagh/study_skills_classes_for_middle_school_students.pdfIn PDF document text
    • http://lugabev.mygamesonline.org/walmart_black_friday_ad_2020_for_11_14.pdfIn PDF document text
    • http://zogometemo.sportsontheweb.net/lifujekumowanuvexewenul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459463/normal_601f78a17b8f8.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/a1b1ba66-55ed-49d7-9825-52fd292e8290/places_in_ponniyin_selvan.pdfIn PDF document text
    • http://remoloki.epizy.com/is_samsung_series_6_tv_4k.pdfIn PDF document text
    • http://nojikigor.myartsonline.com/sipapibororudesetobaris.pdfIn PDF document text
    • http://xutenujute.myartsonline.com/ralasex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92ea04c8-6c7f-4a53-9a7a-d1fcbb361bbe/35082702560.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001169f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1169F 5488 bytes
SHA-256: d2f6ea2816e74c522a0dfc1edcc821f196699a03b6d7682934797920d177b4a3
font_01_sfnt_off00012950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12950 11256 bytes
SHA-256: 5427b71a240b7f66b0445c56edb68053ed148596de0e4376f6a71968585e891c
font_02_sfnt_off00014fec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FEC 16140 bytes
SHA-256: 159427b32ed66bfbde86def5e6c2992bde67dfb25400c4000a37c9b59b949b61

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