Malicious PDF — malware analysis report

Static analysis result for SHA-256 7637a05dba18fbf2…

MALICIOUS

PDF

82.9 KB Created: 2021-03-05 18:50:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 66dfad05a0bbb07d94583b7925641936 SHA-1: ca2e323da66bf6d7590c099cf410e7207e97a153 SHA-256: 7637a05dba18fbf238e6c901fa80396e902c0e0171740b51cdac277ed00b5d4d
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it is part of a link farm or SEO spam operation. The document body, though partially corrupted, contains text related to search queries, reinforcing the SEO spam lure. No scripts were extracted, but the extensive use of external links points towards a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://botokaw.ru/wix?keyword=where+does+picasa+store+original+photos PDF link annotation
    • https://koxawikala.weebly.com/uploads/1/3/4/6/134643159/269bfbfd9.pdfIn PDF document text
    • https://jalupibu.weebly.com/uploads/1/3/4/5/134520797/d59f9f.pdfIn PDF document text
    • https://danifiwap.weebly.com/uploads/1/3/4/5/134585556/jomajipifusoz.pdfIn PDF document text
    • http://fejekadiwoxobiz.getenjoyment.net/wexakudutabu.pdfIn PDF document text
    • http://xafopawiki.medianewsonline.com/sosowesazatuzolavuk.pdfIn PDF document text
    • http://pedalini.club/annabel_lee_analysis_poem3svxw.pdfIn PDF document text
    • http://kaxavetaxudu.mywebcommunity.org/47498339010.pdfIn PDF document text
    • http://mulolivenakafu.iblogger.org/5570654840.pdfIn PDF document text
    • http://tasexevixeve.iblogger.org/spotify_premium_free_apk_file.pdfIn PDF document text
    • http://mobufuwiwid.medianewsonline.com/tiny_homes_plans_canada.pdfIn PDF document text
    • https://nariwezug.weebly.com/uploads/1/3/1/4/131482968/fikagowatepa_budenilumofexut_nijoruj.pdfIn PDF document text
    • http://igme.site/borozijokarutubenabekugh9b6r.pdfIn PDF document text
    • https://titanukudolilip.weebly.com/uploads/1/3/6/0/136082060/powuzolemorude.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/8b7e8c06-1736-4efc-9634-01208e344ff9/lazutowatojugaxedusikir.pdfIn PDF document text
    • http://xetulugesoboko.epizy.com/gopazedosuzolupojiri.pdfIn PDF document text
    • http://sorisavitekinuj.onlinewebshop.net/84016308740.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e48da2e-e56b-42b1-b8c7-2547a1bd18f4/entry_level_mechanical_engineering_jobs_in_melbourne_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/987f88f4-57c3-4c21-9c06-4c60abfc83d3/download_pro_tools_9_mac_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b30ee0da-fd68-44ea-a8c8-f405e1d83bc4/zijedusum.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_off0000f156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF156 1852 bytes
SHA-256: afbdcc984487ec50124148246138b57bdd63108b4be47f896c0d9fd9b1191858
font_01_sfnt_off0000fa2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2D 5136 bytes
SHA-256: 8ead70388141cdf87b3c76cf15fb122ba51b2e8ce3fc86a20407856fac625632
font_02_sfnt_off00010b9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9E 10392 bytes
SHA-256: 543fa65293caa9916471178957765b59ff18a4653f7cd186e2a8c0d5c57752eb
font_03_sfnt_off00012f3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F3C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34