Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a8d732819f5dbe6…

MALICIOUS

PDF

61.7 KB Created: 2021-02-08 17:49:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9aad0925bf410eda316afa95a2038925 SHA-1: 9ec0bce227125880e547bda2335a146fe7465a44 SHA-256: 7a8d732819f5dbe69d23ce8caab6a9f5903d1fa253335a3304b5c1e61730d593
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the PDF acts as a link farm, directing users to multiple external URLs, one of which is associated with a phishing lure. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially malicious content, possibly for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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.
  • 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://bologen.ru/wb?keyword=sensory%20words%20worksheet%204th%20grade PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476294/normal_5fd672d71138a.pdfIn PDF document text
    • http://wiregabjuk.fun/cyberfoot_2015_codigo_de_registroxifb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481062/normal_601132da285bf.pdfIn PDF document text
    • http://blacklaser.ru/60386386965qo3lk.pdfIn PDF document text
    • http://uggi-ugg.com/zunun8pacu.pdfIn PDF document text
    • https://dotaterezisal.weebly.com/uploads/1/3/4/7/134771172/9674274.pdfIn PDF document text
    • http://fruitik.space/movies_tamil_hd_2019v2qqb.pdfIn PDF document text
    • http://reduslim-europa.site/site_reliability_engineering_github1onyv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418981/normal_5ffdc284d6c8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465555/normal_60135f7a2d964.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rusowemiwa.rf.gd/kowok.pdfIn PDF document text
    • http://lizusesujujes.rf.gd/60163342841.pdfIn PDF document text
    • http://nojekakanafigi.rf.gd/68893425519.pdfIn PDF document text
    • http://gamutazuzores.epizy.com/vokegogatug.pdfIn PDF document text
    • http://wogakuw.rf.gd/bunuwowipusuw.pdfIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/50682772666.pdfIn PDF document text
    • http://walefusariwe.epizy.com/11801679118.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/pmir-_report_luciferase_vector_sequence.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_off0000b532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB532 5504 bytes
SHA-256: 698b1d2979da31622eb5bad18bedd438cd6e1a5cd5e10c185cf4de398f2e6f32
font_01_sfnt_off0000c7fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FD 9940 bytes
SHA-256: c107e1f52caeb333fe1d6e56a2f254630413a69a355db73a10dedf0e1ce1d395

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