Malicious PDF — malware analysis report

Static analysis result for SHA-256 46620c363e04f41b…

MALICIOUS

PDF

79.1 KB Created: 2021-02-28 09:16:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6edab0883130cf2816eec58bc382d9f6 SHA-1: 58aa8501f77dadb7881944e02bc160471d01e565 SHA-256: 46620c363e04f41bfde2b6c117d802fc190aa37805e7c001c62133f4bfe19267
156 Risk Score

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://gimoguvi.ru/123?utm_term=how+to+change+invisible+fence+battery PDF link annotation
    • http://jumpfs.space/antrenmanlarla_matematik_1_cevaplar4li9r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372723/normal_5fe227241d60d.pdfIn PDF document text
    • http://myfirstsite.xyz/fuxetuxoat3.pdfIn PDF document text
    • https://zegoliro.weebly.com/uploads/1/3/2/3/132303320/temuxi.pdfIn PDF document text
    • https://borobufa.weebly.com/uploads/1/3/1/4/131406827/d15d7f2bd8d4.pdfIn PDF document text
    • http://dasiroxejipi.22web.org/bobst_die_cutter_manual.pdfIn PDF document text
    • https://bativizamazon.weebly.com/uploads/1/3/4/7/134770744/a7c12ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414678/normal_5feb474347535.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366659/normal_60184c4cb0c83.pdfIn PDF document text
    • http://leqqurint.online/392475058811xxhp.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/jedobufudajewu/analog_and_digital_clock_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/ruvavitori.pdfIn PDF document text
    • http://vuremekewema.rf.gd/23899170137.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/83468579521.pdfIn PDF document text
    • http://nawexox.epizy.com/xumupiditavami.pdfIn PDF document text
    • http://vojapulipono.epizy.com/android_auto_update_apps_schedule.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/jeberinopo.pdfIn PDF document text
    • http://woxutonugosafer.epizy.com/mixavatoladinurobawoxe.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/lds_primary_manuals_2020.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_off0000f791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF791 5500 bytes
SHA-256: 5a9f28c989f457cf17e773fff798bda4cff75fec40dbb6ce21d84b82d30fd942
font_01_sfnt_off00010a64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A64 10732 bytes
SHA-256: f08ebed2be0c3aef5b1296608a4a37b94ece5590463401869069dad6141996b1