Malicious PDF — malware analysis report

Static analysis result for SHA-256 b68a9992ac5b7e05…

MALICIOUS

PDF

70.6 KB Created: 2020-12-14 02:54:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 241907f994af929f4ac7ae6d76169909 SHA-1: d6f3efe83ad373aa450a5235aa8295983db6948c SHA-256: b68a9992ac5b7e05d27b3e9243e338712157447bc1d91093898a2c874feb77d9
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 0.9995

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://trafficel.ru/strik?utm_term=arma+3+altis+life+scripts PDF link annotation
    • https://fodewifejala.weebly.com/uploads/1/3/4/4/134491976/1753301.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/424377.pdfIn PDF document text
    • https://gikigafe.weebly.com/uploads/1/3/4/4/134440869/padozokinunewe_gisegilisupel_notepetorenojel_muvusakune.pdfIn PDF document text
    • https://sifizebutu.weebly.com/uploads/1/3/0/8/130814914/3396640.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/382ddea7-ec12-4513-9b7c-9037056a6b4c/jurower.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/satazadiwepeno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe30fe45-0582-43a8-9b71-17f699831332/mubaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca2c447a-185a-4c0a-8c13-8eed167a4ca4/bound_to_lose_destined_to_win.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/204da7e0-8cdb-4a44-a726-a0ce8106a982/26682137473.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/46467496998.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/zapipapifipevu.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/36285673415.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA2B 3080 bytes
SHA-256: 3b6c3edccbbdf68622c80e44ac099bd4bffa00507f4f1bc839f0bdbf087aa810
font_01_sfnt_off0000c535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC535 4884 bytes
SHA-256: 22086d9a69962b12e9c28b7624adeff54213e0d0d0e2d8c9f0bf9de0701bc346
font_02_sfnt_off0000d5be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5BE 12544 bytes
SHA-256: 94d684db986e1cec6140ed4abc4f67f977100bbe536d5e4ed8a6c84f24208b16
font_03_sfnt_off0000ff0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF0C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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