Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceddf8be9d26a760…

MALICIOUS

PDF

75.2 KB Created: 2021-03-22 01:23:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 97861f351884c529a057b90142d0968a SHA-1: 5d78b2758dae8fd0b0f1b5119448cf29db58b848 SHA-256: ceddf8be9d26a760f83360a1f31e0e67d90303c98ba627abc725987b85a8d293
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/strik?utm_term=stihl+edge+trimmer+price+south+africa PDF link annotation
    • https://jexafowasefuxuv.weebly.com/uploads/1/3/4/5/134588667/5b3860f18b6.pdfIn PDF document text
    • https://cdn.sqhk.co/vukupamita/ejjh6jc/33859336947.pdfIn PDF document text
    • https://vorufiduwesonuf.weebly.com/uploads/1/3/5/3/135314955/da67420b6a1.pdfIn PDF document text
    • https://xisofufewazexi.weebly.com/uploads/1/3/0/7/130776718/gedatubaso_xosimuwejesa_zenutin.pdfIn PDF document text
    • https://zufulakoloti.weebly.com/uploads/1/3/5/3/135301661/xuviserepuxu-naxidemulivewi-niniz-vunolumif.pdfIn PDF document text
    • https://cdn.sqhk.co/fexilejedit/Shb4Txp/litopojujasomibikus.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/zarusegibitumet/12758406575.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/daisy_flower_template.pdfIn PDF document text
    • https://de99934f-f465-4d69-af5e-14f317c0a7c6.filesusr.com/ugd/4fea5c_a4292c05015741cf85ffdf0d9d547a36.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/nofavubosegezo.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/zesozulokikozo.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/manual_de_sobrevivncia_escolar_do_ned_assistir_online_dublado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d49df62-3b2f-4db7-9518-60e6fde44938/64571347109.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd2ea922-3672-43dc-afa4-4ca404894c11/procreate_ipad_app_cost.pdfIn PDF document text
    • https://ac685e6e-6442-44c0-91a1-b3a367e79ef2.filesusr.com/ugd/ce77c6_52f939e585a34924ab23cd878a0970eb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pezofut/easy_video_player_android_library.pdfIn PDF document text
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_e343d0d938f04324a298c8133c47cb27.pdf?index=trueIn PDF document text
    • https://e39bfc17-a898-4016-ac91-fc9303c112df.filesusr.com/ugd/b5068a_e8b71697178941598fa176ca66573549.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/dofugaraxojexisogefukidej.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_off0000e65f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65F 5672 bytes
SHA-256: c9dd50190586443884cd2cdcf7dcf31c4ab150234c5d7e9ea4fa59d4c1b498a9
font_01_sfnt_off0000f981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF981 11092 bytes
SHA-256: 8517f767684fb3256b1321c4e625baa20bfe91bb16a694d423fec3d34507aedc

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