Malicious PDF — malware analysis report

Static analysis result for SHA-256 024a71eee2c3133c…

MALICIOUS

PDF

66.7 KB Created: 2021-04-19 17:28:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: de917ea194b849fb919a1f73d2d20f35 SHA-1: 1ff91d204181408fa690215e2f32efdb41e75207 SHA-256: 024a71eee2c3133c286deda530d6b943b07c015a3d69405a3e90e6be8104f1a4
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are hosted on disposable domains or services, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://kuzutuzo.ru/strik?utm_term=why+is+my+washer+not+locking PDF link annotation
    • https://safalijig.weebly.com/uploads/1/3/1/0/131070993/8beb1d2.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://ijmalan.xyz/tamuvutexosiffqn6b.pdfIn PDF document text
    • https://tetagusupawuwag.weebly.com/uploads/1/3/4/5/134586179/bdbcd650d3019.pdfIn PDF document text
    • http://copyrightsupportforlnstagram.com/884422701200jm9w.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/23c3d4fc-480e-4864-9842-59ba41344dc6/dodge_durango_towing_capacity_lbs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cec85ac-9f41-4ca7-92ed-915291fd46cb/35383129481.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/vuwajonusuniwirokotuge.pdfIn PDF document text
    • http://juvemekexiki.rf.gd/the_art_of_technical_documentation.pdfIn PDF document text
    • http://rupufunolodul.rf.gd/56097496050.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/xodini.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/chillane_22_female_kottayam_song_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef9385d9-0fa8-41cb-922f-cef671baf14c/kijanekuwo.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/ms_sql_create_function.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/145ce0ef-4b46-4978-a1a8-ec014e4c32d7/kesufukisoxazizanedulifub.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_off0000c69c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC69C 5484 bytes
SHA-256: 4b535b806e6a6c9c2b4c5bfc86abef892285908e51718dbe22b5bf26acf68887
font_01_sfnt_off0000d935.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD935 10616 bytes
SHA-256: 4856cdee767a303c895cdbbc7b39fd7900ebe1b62022c619c7861d4361d8419a

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