Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ae464cf18b354cc…

MALICIOUS

PDF

72.0 KB Created: 2020-11-16 23:07:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: caea54532309fd48cd47a7707113760a SHA-1: b53ae85ca588425113e5e7fae3cc80dca3205469 SHA-256: 6ae464cf18b354cc3d8752bf4c4ba2de0c504cd3a1aa0f9af2972e459ae33c2f
244 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious sites, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' heuristics. The document body, though heavily obfuscated, suggests a lure related to educational content to entice clicks. The presence of numerous external links, many hosted on disposable domains, further supports a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffine.ru/123?utm_term=creative+problem+solving+in+school+mathematics+download In PDF document text
    • https://zisogojevup.weebly.com/uploads/1/3/1/4/131453725/3ab56.pdfIn PDF document text
    • https://jemeleromonojo.weebly.com/uploads/1/3/4/0/134041090/wosologulo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372982/normal_5f8fee8ee9a6f.pdfIn PDF document text
    • https://fobedixosofano.weebly.com/uploads/1/3/4/3/134377241/861039.pdfIn PDF document text
    • https://rimuzomidaz.weebly.com/uploads/1/3/4/3/134353295/saxedefijimikabibofo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379236/normal_5f9282f4209f9.pdfIn PDF document text
    • https://kagilovudugavap.weebly.com/uploads/1/3/1/1/131164538/032c51c04eee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369311/normal_5f89ae493d538.pdfIn PDF document text
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/nukanu_lulex_dukasujadarunaf_wapopezorozetak.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/2f3fab25-3b34-4697-9972-46c5cb43b0de/omu_treasure_maps_locations.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/magical_cat_names_male.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/67241162039.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_off0000db71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB71 5684 bytes
SHA-256: 74bf6005aeb0e0ecfa6e336fc8987a2fd9fa96f5033dfd49771dc783acd8c7ec
font_01_sfnt_off0000eea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA2 10620 bytes
SHA-256: e8c96e06fa44dee8c9e68e5227da05795ff8e84455f6eafa5a2b533401ac0b44

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