Malicious PDF — malware analysis report

Static analysis result for SHA-256 c22e82a7c57eb2bc…

MALICIOUS

PDF

64.8 KB Created: 2021-01-10 03:02:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: aba0a6cfc94d7256689a981ef97e5a59 SHA-1: 9beef4b5efeb9dc1db80848f4c3151ead908a38f SHA-256: c22e82a7c57eb2bc40f140101282a9f65a4d338a0ecf6ccb7fac2a8c4c9d2a5c
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to external websites, with one identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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://gettraff.ru/aws?utm_term=unicorn+coloring+sheets+for+adults In PDF document text
    • https://cdn.sqhk.co/vimanagadu/TmFCjaV/67662815024.pdfIn PDF document text
    • https://wibizoginoj.weebly.com/uploads/1/3/2/6/132681485/tolapevo_ridon_vinubefubapuler.pdfIn PDF document text
    • https://site-1167992.mozfiles.com/files/1167992/men_s_fifa_world_cup_2017.pdfIn PDF document text
    • https://cdn.sqhk.co/sexifirume/ej6jbM3/83778940712.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383703/normal_5feeb8f72af82.pdfIn PDF document text
    • https://bojurejid.weebly.com/uploads/1/3/4/8/134887271/wowanutes-popajug-gifixud.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/sezebepit/gokonotiwafataxupawejimon.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/71410695388.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/32026407219.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/dotakidujewaporal.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_off0000c237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC237 5272 bytes
SHA-256: a1ee7531bde1a17374cb8461a31e7238e8ff7a22da0f6faeb15e0364fc70ff54
font_01_sfnt_off0000d420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD420 10256 bytes
SHA-256: d8240585880102aa4af04d5267c362e3bb15591edddd87b5adcc035e087d911a

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