Malicious PDF — malware analysis report

Static analysis result for SHA-256 1812c4d5436a5150…

MALICIOUS

PDF

79.3 KB Created: 2021-03-14 11:11:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: b88f478534603dc4eca8b8ac25ea06c7 SHA-1: 5d9d05bc1ac632d8d12c13ca26db5717e8895bed SHA-256: 1812c4d5436a51507d2cc95d18ada56d1534d81ffbd34808cc028a8c5befd234
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with a primary focus on directing users to external sites like 'https://xajibur.ru/wix?keyword=letter+of+instruction+template+word'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the PDF is part of a link farm designed to host many disposable links, further supporting a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/wix?keyword=letter+of+instruction+template+word PDF link annotation
    • https://xenesadu.weebly.com/uploads/1/3/0/7/130739949/2508926.pdfIn PDF document text
    • https://lijipowurop.weebly.com/uploads/1/3/4/3/134314174/fb13fb0.pdfIn PDF document text
    • https://faxojoduso.weebly.com/uploads/1/3/5/3/135351685/kejopowopubiwirenike.pdfIn PDF document text
    • http://trickyturkey.com/zajeviswsfcn.pdfIn PDF document text
    • http://vipogomer.iblogger.org/how_do_you_change_the_batteries_in_a_stealth_cam.pdfIn PDF document text
    • http://stopro.store/i_102_how_long_does_it_takeqx27v.pdfIn PDF document text
    • https://sotumeramevoma.weebly.com/uploads/1/3/0/9/130969712/158936.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luxizetugo.epizy.com/61792259437.pdfIn PDF document text
    • http://fowimifefezujo.myartsonline.com/34826957504.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef578dc5-8cce-4e24-b969-e95b97fe98dc/1323856787.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/93707535666.pdfIn PDF document text
    • http://dujazenemelix.epizy.com/julamelan.pdfIn PDF document text
    • http://labiwuju.rf.gd/the_hermit_tarot_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/e_commerce_website_templates_free_asp._net.pdfIn PDF document text
    • http://vonanovab.epizy.com/cbs_news_los_angeles_investigative_reporter.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/6144484076.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aac9dc66-ec93-494b-ba88-9ac8346a8378/bibomipivinufaritune.pdfIn PDF document text
    • http://lugenizuridaj.atwebpages.com/49942992386.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33d45ebd-70d7-4104-957d-c30644e35888/87929328475.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_off0000f4de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4DE 5336 bytes
SHA-256: 259602e9ffc1bcd060bf5b9af793a56e100fe5d6b11dc41949cf2461b3920d65
font_01_sfnt_off00010703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10703 12124 bytes
SHA-256: 6d49b2acbd7679c0efa7a99638379103c96ca7e81adb5bc787454f4b8d8fed68

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