Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce94f3bf06a9ff2b…

MALICIOUS

PDF

69.4 KB Created: 2021-01-18 18:17:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b436bf6e9490a9fc2b6f96ab3d1c6cc4 SHA-1: b9be1239cabae4f38bde328a1e4cdf45d7d3a279 SHA-256: ce94f3bf06a9ff2baebbd4171c4e7288370582d4d2ffdfacb95b1528e2539409
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/123?utm_term=lord+i+need+you+chords+in+g'. Additionally, it exhibits characteristics of a PDF link farm with numerous external links, including one to 'https://s3.amazonaws.com/tadovu/kepotikatowijekikexiv.pdf'. The ML classifier and ClamAV also flagged this PDF as malicious, indicating a phishing or trojan-like intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/123?utm_term=lord+i+need+you+chords+in+g In PDF document text
    • https://site-1187467.mozfiles.com/files/1187467/grand_tanks_best_tank_games.pdfIn PDF document text
    • https://komomofuxuz.weebly.com/uploads/1/3/4/4/134494735/vopomapujexemar.pdfIn PDF document text
    • https://site-1221616.mozfiles.com/files/1221616/japan_guide_osaka_pass.pdfIn PDF document text
    • https://vilotirupoj.weebly.com/uploads/1/3/5/3/135328316/3231820.pdfIn PDF document text
    • https://site-1176996.mozfiles.com/files/1176996/9362967395.pdfIn PDF document text
    • https://risimukino.weebly.com/uploads/1/3/1/3/131383953/teburuvunefudu.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://s3.amazonaws.com/tadovu/kepotikatowijekikexiv.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/97103219530.pdfIn PDF document text
    • http://sepuxukejobome.epizy.com/english_dictionary_karna_hai.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/55114651490.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/guia_aceites_esenciales.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/netflix_para_android_4._1_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/51246392248.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F2 4804 bytes
SHA-256: 0f107e5965b58ec862711060479c3aed57c86477b782f8b6e63a20ff5135240a
font_01_sfnt_off0000d83b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD83B 10000 bytes
SHA-256: b1cc49622215e4eb48283d8621f1e0f3d5ae636e319e144c593eb790b0a4e303
font_02_sfnt_off0000fa8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8A 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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