Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dd68a466624d463…

MALICIOUS

PDF

59.4 KB Created: 2020-11-19 06:32:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ff1d447aa1664a021e5968965a2602f9 SHA-1: b3374bf3cb8a0d9c580ba8155611db3975ed5e63 SHA-256: 2dd68a466624d463a833e2b11b59ebaf1e5208fd7500343d0b653154cd2d2422
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many pointing to PDF files hosted on various domains, suggesting a link farm or redirection scheme. The ClamAV detection and ML classifier indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafficel.ru/123?utm_term=2004+scion+xa+repair+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f8716e2661b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461516/normal_5fb5dfe73f496.pdfIn PDF document text
    • https://liwobolavus.weebly.com/uploads/1/3/4/1/134131542/lobapikonivexajet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367632/normal_5fa3f1ae9d1e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368265/normal_5fa7a22916b73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366408/normal_5f89a2c0e8353.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413977/normal_5f9b671a731b6.pdfIn PDF document text
    • https://vogaxuruxav.weebly.com/uploads/1/3/4/3/134352923/727718.pdfIn PDF document text
    • https://kirewigofe.weebly.com/uploads/1/3/4/3/134382955/633068cb134aaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453550/normal_5fa7f88c8d777.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406241/normal_5f9978e2b646d.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/zetare/voput.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/60721872933.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_off0000ac8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC8B 5416 bytes
SHA-256: 19715ac74f6715ff7e8b2893d8204ad0174c25325a0bd83cc9f901394377a69e
font_01_sfnt_off0000bee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEE9 9976 bytes
SHA-256: 92138b9e7c793eb94953292d4cf0da6d72b3a6175bcf4d74cb659bb04e66d8dc

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