Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0c9f90112cd2cee…

MALICIOUS

PDF

74.6 KB Created: 2021-02-13 04:47:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: cf899b6aae36d693935819686af5be3e SHA-1: 63fffdcada4528396e0771e9667e0aca7fe96917 SHA-256: f0c9f90112cd2cee28a3deb512905e24f316edfb89578f258dacc07f93d003f1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

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 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.
  • 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://crophysi.ru/wix?keyword=amana+wall+air+conditioner+manual PDF link annotation
    • https://luragelekow.weebly.com/uploads/1/3/4/3/134377287/vagik.pdfIn PDF document text
    • https://nibadaxolakawub.weebly.com/uploads/1/3/4/8/134882114/xetumane-salakilig.pdfIn PDF document text
    • https://vogaxuruxav.weebly.com/uploads/1/3/4/3/134352923/lupaged.pdfIn PDF document text
    • https://lizulamuti.weebly.com/uploads/1/3/1/6/131607093/bitirumu_fijenabi_lusozoxipugifij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497131/normal_5ff914d5aa699.pdfIn PDF document text
    • http://wedavinonuvovu.22web.org/deep_freezer_size_guide.pdfIn PDF document text
    • https://rikatawifusozib.weebly.com/uploads/1/3/1/4/131409861/453f0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/7843942484.pdfIn PDF document text
    • http://nowapuporab.epizy.com/cisco_3850_ios_software.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/moxufirujobevob.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/battlefield_1_key_activation.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/b._a_pass_movie_1080p.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/38141455434.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/13702311823.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/citation_apa_format_purdue_owl.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/alliance_air_war_android.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/free_ppt_templates_family.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/99383520874.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/easy_anti_cheat_paladins.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_off0000dd0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0A 4988 bytes
SHA-256: a5cc846229c3a6ab1aaf17ac37a269ce4a3a2a7eb812f41c412e19b5934ce2f3
font_01_sfnt_off0000edea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEA 2484 bytes
SHA-256: 3957183e8ce92d98792d4d932155d0057f4773d25fcb72ecf8e2056c5eb9c99e
font_02_sfnt_off0000f88f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88F 10780 bytes
SHA-256: de2337e43c2fa6968bc30467dfbcf318e80024c362ae375c3486d921c6de79ec

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