Malicious PDF — malware analysis report

Static analysis result for SHA-256 89dd4792a615dc58…

MALICIOUS

PDF

89.6 KB Created: 2021-03-01 02:19:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 02c1b5a41d5cbdbe3e0d842b087236a4 SHA-1: 74dfca619c818e34b8a75fbc2a1187c5a6727a8e SHA-256: 89dd4792a615dc58c9344144c6d49c4e5cfda8ae49d653bf4d0ad5f771ccdded
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, pointing to various domains including 'fokemale.ru'. While the document body is heavily obfuscated and unreadable, the presence of numerous external links and a ClamAV detection for 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely related to phishing or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://fokemale.ru/award?keyword=garmin+zumo+660+reviews+uk PDF link annotation
    • https://takadoturig.weebly.com/uploads/1/3/4/1/134108809/9184740.pdfIn PDF document text
    • http://jakor.pro/150878695194w8wh.pdfIn PDF document text
    • https://rozinezo.weebly.com/uploads/1/3/1/6/131636990/jojage.pdfIn PDF document text
    • http://dulexip.22web.org/film_the_amityville_horror_2005.pdfIn PDF document text
    • https://defupodanujazi.weebly.com/uploads/1/3/5/3/135346118/gujag_nejenavujopefav.pdfIn PDF document text
    • https://zififawatef.weebly.com/uploads/1/3/4/3/134384507/losoru.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/navoburarovada/54700591746.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/27371575150.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/glorious_day_casting_crowns_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/sidatumomegizusoxi.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/pop_warner_sign_up_forms.pdfIn PDF document text
    • http://milodip.epizy.com/55037502621.pdfIn PDF document text
    • http://buwijakuwomem.rf.gd/4th_grade_math_common_core_standards_worksheets.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_off0001242c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1242C 5392 bytes
SHA-256: d12053bbab74a06366a219d533a5efee0df164a33aacbe146fe20676f5831ea9
font_01_sfnt_off0001368d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1368D 10240 bytes
SHA-256: 131ace53ed46be850ca1c5f3d2c3c940f663b19f4005ad1722b67e4ba9a7bd96

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