Malicious PDF — malware analysis report

Static analysis result for SHA-256 54528fc2623643e7…

MALICIOUS

PDF

65.7 KB Created: 2020-12-25 15:14:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 52c170b2124ec24955dd87d0574b20b9 SHA-1: c2969a72b86497e387e416dd5fcafc20fbcf76fe SHA-256: 54528fc2623643e77648e5a4f53a3e7b9011a951c193f3db62205d14a3e3d055
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It contains a link farm of 20 external PDF links, many of which point to redirectors or potentially malicious content. The primary redirector URL is https://traffking.ru/strik?utm_term=pet+paradise+orlando+locations, which is associated with phishing and malware distribution. The file's structure and content suggest it's designed to exploit users by directing them to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • 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.
  • 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://traffking.ru/strik?utm_term=pet+paradise+orlando+locations In PDF document text
    • https://tevuvusit.weebly.com/uploads/1/3/4/3/134373155/tulawaso-dewiniz-wumepu.pdfIn PDF document text
    • https://tariroviwobin.weebly.com/uploads/1/3/4/7/134715354/7404381.pdfIn PDF document text
    • https://zexajupa.weebly.com/uploads/1/3/4/6/134692079/vagatupu_lozuvofidasulo.pdfIn PDF document text
    • https://katesagi.weebly.com/uploads/1/3/4/8/134864962/mopolur-pejegaba.pdfIn PDF document text
    • https://cdn.sqhk.co/rejibebadit/Yhggjsk/techno_music_online_radio_stations.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc7b805d-578c-4495-9871-a96c3123ff0b/61397814021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a28e329c-7c04-46e8-a3b1-3c5363b8bafb/64713818350.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/rustic_floral_wedding_invitations_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/843fe4b0-04ae-4b32-b093-ce237b1b4ef2/gowovivi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d57c1e4-63dc-4ea1-a99a-17301be5dbfb/podov.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_off0000c489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC489 5068 bytes
SHA-256: 3408f858d3ff3caaada530b19a15b7dd64c5e1eee234e9d2dc344882f82fe00e
font_01_sfnt_off0000d5d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D1 10760 bytes
SHA-256: 357967a455b88b6263c279329a73444a09106fe61100d60131b83e5353fbd4f7

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