Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d8a443bd491cc29…

MALICIOUS

PDF

80.6 KB Created: 2021-03-17 12:51:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 22dc6e91cccff6124fec8cc6d5ad82a8 SHA-1: 8961e9d4313a215cf0043b46731cabadc05cf498 SHA-256: 8d8a443bd491cc2958b4283e3ba771a65d81e1ad464d02b52f74e1172bdcb7f2
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 0.9993

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://baarspo.ru/123?utm_term=bangsamoro+basic+law+draft+pdf PDF link annotation
    • https://puziwifatewir.weebly.com/uploads/1/3/4/7/134715637/a1c138a.pdfIn PDF document text
    • https://migobagola.weebly.com/uploads/1/3/4/8/134874333/b001a19e.pdfIn PDF document text
    • https://ponebivilu.weebly.com/uploads/1/3/4/5/134505494/2ea312a6716db.pdfIn PDF document text
    • https://wisapemewe.weebly.com/uploads/1/3/4/7/134713478/8705263.pdfIn PDF document text
    • http://fatowafelu.iblogger.org/sample_cv_microsoft_word_format.pdfIn PDF document text
    • https://mutazodot.weebly.com/uploads/1/3/0/8/130874237/wibap.pdfIn PDF document text
    • https://boxesagako.weebly.com/uploads/1/3/4/5/134589877/f079adfb5624261.pdfIn PDF document text
    • https://bisatabezuniv.weebly.com/uploads/1/3/1/3/131398333/7145044.pdfIn PDF document text
    • http://xurijozidarov.22web.org/18787710445.pdfIn PDF document text
    • https://xepevuke.weebly.com/uploads/1/3/0/7/130775471/2518503.pdfIn PDF document text
    • https://silajawa.weebly.com/uploads/1/3/4/3/134339193/kapipitefebapojot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xipudabokodem.epizy.com/bomb_it_7_game_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/4620964515.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/how_to_mix_ppg_paint.pdfIn PDF document text
    • http://vebuluxuj.rf.gd/sojubudetefetavozubozit.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/base_plate_design_spreadsheet_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/61029956788.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c6a48d2-7f54-438e-934b-1ef914ae5900/fexolemawofabefoxunap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bfdfc11-9f17-4f4e-81dc-658efd1831c7/techno_gears_marble_mania_genius_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acea33a3-a94f-4e92-a57a-f91b7f26fc67/fiwonapikefuputarokotez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b63b65d-dbed-4ef4-9d0e-42d6a29d4b76/58138396016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3257161e-28e8-4371-9663-6c97045db70a/xusezajifitusam.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/lelejiduzivibexonodujud.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/how_to_burn_wheel.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_off0000fc20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC20 5756 bytes
SHA-256: b51e20f22dc5c768013b658b83d7230c1b59e7fcfc09bbb6546c395f7f6d7545
font_01_sfnt_off00010fb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB8 10468 bytes
SHA-256: 9695e61561d025bc1efd42eb33f11518f59e29fe7abbf803655dfcd0895d3251

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