Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd780dd5c4940430…

MALICIOUS

PDF

77.0 KB Created: 2021-03-23 23:14:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 9255f35c340b567d431702f8c0f8b388 SHA-1: 3e80d25dad4e5f0864d5f696fe69b577e2cbcb5f SHA-256: cd780dd5c4940430b1cea41dcda3552cd154331e801ea3d80f18b116a46735b1
186 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 high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The embedded URLs point to various PDF files, likely serving as lures or redirects to malicious content.

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
  • 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.
  • 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://xezojetit.ru/123?utm_term=consumer+reports+top+reliable+used+cars PDF link annotation
    • https://vakenufepuxino.weebly.com/uploads/1/3/4/5/134529081/2115210.pdfIn PDF document text
    • http://patajafurep.mywebcommunity.org/zedumov.pdfIn PDF document text
    • http://derapom.iblogger.org/rolatavinefak.pdfIn PDF document text
    • https://mifakukataw.weebly.com/uploads/1/3/5/3/135349500/1f45a78.pdfIn PDF document text
    • https://zedetebi.weebly.com/uploads/1/3/1/0/131070456/4322325.pdfIn PDF document text
    • https://wunogalabapa.weebly.com/uploads/1/3/4/6/134603674/tipamuvezemunukelum.pdfIn PDF document text
    • http://xadojewivo.iblogger.org/auxiliary_verbs_examples.pdfIn PDF document text
    • http://pesetatin.iblogger.org/hunter_douglas_electric_blinds_not_working.pdfIn PDF document text
    • http://gunofixe.medianewsonline.com/tecnologia_da_informatica.pdfIn PDF document text
    • https://kofosobi.weebly.com/uploads/1/3/4/5/134528260/7037892.pdfIn PDF document text
    • https://bupedokan.weebly.com/uploads/1/3/1/6/131607930/3390730.pdfIn PDF document text
    • http://nerazegizetikam.getenjoyment.net/arbitration_definition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://raxajabidadida.onlinewebshop.net/pokubuxab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82bceb68-fea9-497f-a3a6-9799f5f4dd66/in_the_end_who_will_tell_the_story_of_your_life_lyrics.pdfIn PDF document text
    • http://birenogidovolus.rf.gd/80623518023.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62a9de24-6afd-433d-a129-5296fdb3ad7a/android_app_development_using_android_studio_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e37cf8c6-b31c-4cb1-9420-3949f796fd04/78431084598.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e12d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12D 5264 bytes
SHA-256: da2edef1d81fb3f9728b1f3a5ff39d9e333dfd69a1158959c774e9d0e254f248
font_01_sfnt_off0000f2ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EA 11124 bytes
SHA-256: b5fbb051f0174904839e3c129e70fe940e0c6498708e42404c1af08dedfbe396
font_02_sfnt_off000118d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D5 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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