Malicious PDF — malware analysis report

Static analysis result for SHA-256 57f12f343a1c8419…

MALICIOUS

PDF

67.7 KB Created: 2021-01-10 17:46:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 108623b2eb765bc24137af14b628b15e SHA-1: 69bb0c09843b906b9e633a85a34c4d895a245ebe SHA-256: 57f12f343a1c8419884bae0f00407aadeb23136cb2a3e9f690d2024658ae2eef
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying a link farm and a high-confidence heuristic flagging an image lure linking to an SEO redirector. The primary malicious URL identified is 'https://traffset.ru/aws?utm_term=certificate+of+origin+form+a+india', which is likely used for phishing or to serve a second-stage payload. ClamAV also detected the file as 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffset.ru/aws?utm_term=certificate+of+origin+form+a+india PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495846/normal_5fb695873147c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370547/normal_5f9d72d9c6129.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384318/normal_5fc6d6e3e3e5f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470029/normal_5ff51cb2c7ee0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460982/normal_5fed48f0adf42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373788/normal_5fd96613323cb.pdfIn PDF document text
    • https://site-1181123.mozfiles.com/files/1181123/bebojuka.pdfIn PDF document text
    • https://gejewesogoj.weebly.com/uploads/1/3/4/6/134612034/pisowon.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/jepavilutabilel/digital_swr_meter_sw-102.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/nagelurirafag.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/28183410153.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/bhakti_picture_ing_hd_video.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/letras_de_canciones_cristianas_en_power_point.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/captain_marvel_wallpaper_for_android.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_off0000cee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE1 5036 bytes
SHA-256: f96a59976e02cf612b2020fa391c122e590c651976c20842fec440c36867056f
font_01_sfnt_off0000dfe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE9 10032 bytes
SHA-256: 792742a1370901ce233e7241961737b663c0d681cdba87a960d5c7091fb3fe7f

Open this report in the interactive analyzer, or submit your own file for analysis.