Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e97d9c6015f433c…

MALICIOUS

PDF

80.0 KB Created: 2021-04-04 02:06:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 931401ae70045296e8cd4349a7ce7bf5 SHA-1: 308c1966f5976340010a076491ffec51b0fa921a SHA-256: 8e97d9c6015f433c87c55ff851086908c03602c425f9dbb8f5c9abafbbb8aa25
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 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=hello+in+there+baby+book+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4487208/normal_5fd2d474d9ff6.pdfIn PDF document text
    • http://kernig.pro/60669423410kckc8.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwoxebu/OZchcgm/doman.pdfIn PDF document text
    • http://vilopeg.xyz/which_is_better_vegetable_oil_or_animal_fat615kk.pdfIn PDF document text
    • http://bio-ita.fun/pixugegomegirijojoxidetobukp86.pdfIn PDF document text
    • https://cdn.sqhk.co/lajefage/ijgg6hj/fexopavikapukupibo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403282/normal_600be73301deb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448545/normal_60542bde50b22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449421/normal_6020ffc823af3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380395/normal_5fe54beee8a5b.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/jfwIhis/hopeless_the_dark_cave_hack.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381988/normal_5ff89caeadbe7.pdfIn PDF document text
    • https://cdn.sqhk.co/lozuzupadis/jhjh2ib/garulezolewejavefolesil.pdfIn PDF document text
    • http://goodsun.fun/long_way_down_movie_ewan_mcgregorbr1tz.pdfIn PDF document text
    • http://cleanup-sale.site/masiboluzofezifuganizuj0zxye.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488592/normal_5ff2ffb73b5ea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/0d008bab-cf9d-4515-9dcc-e7c65904a721/3431854503.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81bc0964-fb32-49a0-b3e7-be37b118505b/95552702863.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29c8907a-13c5-4599-9f1f-81d9a99b96c1/wanafaboxuzurelasusuwaku.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/90094233968.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a9b9b89-5a1b-4367-9899-9ad80a85a9ca/cisco_cp-8841_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/9686962655.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/820f1f87-73bb-437e-bf6b-8beaeb359958/anime_de_animales_humanos_2019.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eda6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA6 5008 bytes
SHA-256: 56fdfd3a907e2ac5f5c4915ba758c89ff46d5e47173573c75897142271b13980
font_01_sfnt_off0000fe97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE97 10620 bytes
SHA-256: 546c8bd9f6a23b984d782e5a45aa0467b37fc62ddd3f084302e5dbec145facd2
font_02_sfnt_off000122ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122EE 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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