Malicious PDF — malware analysis report

Static analysis result for SHA-256 91b0de22dee1ae67…

MALICIOUS

PDF

87.5 KB Created: 2021-01-03 06:11:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d51b66b073b41171d0c668101cf7c755 SHA-1: d34839638a9c3309475c886be3243232d4e94acd SHA-256: 91b0de22dee1ae67002e821d1a7703d5991dd170441f998a67c7660494039c72
214 Risk Score

Malware Insights

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

This PDF contains numerous embedded links, many pointing to link farms hosted on services like Weebly, suggesting a phishing or SEO poisoning campaign. One critical heuristic indicates links to known malicious redirector infrastructure, specifically 'ggtraff.ru'. The ML classifier and ClamAV detection strongly support its malicious nature, likely as a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ggtraff.ru/123?utm_term=mtga+starter+decks+2021 In PDF document text
    • https://direwuberegenis.weebly.com/uploads/1/3/4/3/134361890/9fc50c293.pdfIn PDF document text
    • https://sigozebuxofiko.weebly.com/uploads/1/3/4/3/134372047/5530dd.pdfIn PDF document text
    • https://zuzedunili.weebly.com/uploads/1/3/4/4/134460484/4763654.pdfIn PDF document text
    • https://cdn.sqhk.co/sozaxejiv/f4jgTjg/nizowuk.pdfIn PDF document text
    • https://babinekisifuve.weebly.com/uploads/1/3/2/6/132696104/8725946.pdfIn PDF document text
    • https://lexolegav.weebly.com/uploads/1/3/5/3/135350326/rizorekanukarime.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/bakoloj/electron_energy_and_light_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/woxoruzi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a30a14b-f7d2-4d1a-9eba-23e42d97d5a2/vivegam_box_office_total_collection.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/antivirus_android_tablet_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88c201b0-85c2-4b6e-887d-a1e9b80d2590/92525804434.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb0d5f6f-4cb6-4c7a-9a37-774ed9ccf779/zitusa.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/74640216384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b73d4c3d-1996-4b5b-bace-c1615155e1ca/jejefutemazegof.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_off000118dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118DD 5472 bytes
SHA-256: 9f5d1295530866302b2e663422b8643a894f71f0d2d6daca675fc0ebd92c83a6
font_01_sfnt_off00012b9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B9C 11288 bytes
SHA-256: e874954361cb58dedde7c58d224299b361508c188320396b6e05b05ec27c75dc

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