Malicious PDF — malware analysis report

Static analysis result for SHA-256 0894d83c8dc9f723…

MALICIOUS

PDF

66.3 KB Created: 2021-01-15 06:10:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 9aec5c8c3c0801be6df721387ba68e09 SHA-1: cca2d4b41c10add95bff78fc966849e2bf2f4567 SHA-256: 0894d83c8dc9f723a8c9c57ec2d8fe2265cca855a06d025bc65e7177740b5d13
244 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many pointing to disposable hosting services and one known malicious redirector. The primary function appears to be directing users to potentially malicious external content, consistent with phishing or malware distribution lures. No scripts were extracted, but the heuristic firings strongly indicate malicious intent through link manipulation.

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
  • 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://ggtraff.ru/aws?utm_term=chaffle+recipes+pdf In PDF document text
    • https://woxazalaxit.weebly.com/uploads/1/3/4/2/134235403/b7b676d93.pdfIn PDF document text
    • https://keduwiwisa.weebly.com/uploads/1/3/4/4/134486116/48f951acb.pdfIn PDF document text
    • https://wegupufula.weebly.com/uploads/1/3/0/8/130813429/17c922eeb6dd7b.pdfIn PDF document text
    • https://pibusabet.weebly.com/uploads/1/3/4/6/134695111/1755465.pdfIn PDF document text
    • https://lokejarezuwomi.weebly.com/uploads/1/3/0/7/130776656/0a294520e96.pdfIn PDF document text
    • https://site-1178726.mozfiles.com/files/1178726/sasavenapawazofivabasu.pdfIn PDF document text
    • https://site-1175722.mozfiles.com/files/1175722/wheel_of_life_assessment_test.pdfIn PDF document text
    • https://busaluvugisegiw.weebly.com/uploads/1/3/4/3/134368440/dedegutijililatipal.pdfIn PDF document text
    • https://lewonodi.weebly.com/uploads/1/3/4/3/134330754/0bb2e3771e.pdfIn PDF document text
    • https://site-1178304.mozfiles.com/files/1178304/bird_of_paradise_bush_seeds.pdfIn PDF document text
    • https://site-1178750.mozfiles.com/files/1178750/ninuse.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367294/normal_5f9a046538d97.pdfIn PDF document text
    • https://cdn.sqhk.co/mozedizupi/epicjao/10555514664.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC787 5148 bytes
SHA-256: a49ac164d590bc4cf54ae5d26aaffff4c64078221016ffedc2cc0c3608e502ad
font_01_sfnt_off0000d8fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FE 10652 bytes
SHA-256: 8cb69a19b1139ed3abc75cfa58c17c55bdba7244f839409965ce8efb42871ff8

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