Malicious PDF — malware analysis report

Static analysis result for SHA-256 d52dced9136d61c6…

MALICIOUS

PDF

70.8 KB Created: 2021-01-21 01:45:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4f5e172918602b39b8d6ec9485279496 SHA-1: 7067aba4d33a8a9e5f3fbd4377da02c20f6cee0b SHA-256: d52dced9136d61c6c1f0ca3cdba676f283e8eeac30938a727f5b50bf8734d520
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable hosting and known malicious redirectors, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious redirector pattern, likely leveraging embedded JavaScript for execution.

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
  • 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 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://cctraff.ru/123?utm_term=tru+triple+slow+cooker+replacement+parts In PDF document text
    • https://saxunada.weebly.com/uploads/1/3/4/8/134865385/vevivapugufire.pdfIn PDF document text
    • https://lavidibiw.weebly.com/uploads/1/3/4/5/134582964/lizox.pdfIn PDF document text
    • http://wusejopajaxus.22web.org/notutiz.pdfIn PDF document text
    • https://nirejabepifu.weebly.com/uploads/1/3/4/2/134266024/mavobonite.pdfIn PDF document text
    • https://nilidufudomalo.weebly.com/uploads/1/3/2/7/132740748/gagovigibedil.pdfIn PDF document text
    • http://dobafeser.66ghz.com/choreiform_movements_cerebral_palsy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bokelur/best_japan_guide_book.pdfIn PDF document text
    • http://movafomuwexowix.epizy.com/zizafasujebuxusazujavavid.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/bible_characters_list.pdfIn PDF document text
    • http://rodiwube.epizy.com/dexugaroxafeveni.pdfIn PDF document text
    • http://fafozega.rf.gd/angularjs_bootstrap_admin_template.pdfIn PDF document text
    • http://nototen.epizy.com/fukofapel.pdfIn PDF document text
    • http://varoxekoduv.epizy.com/tiropabenopejefix.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/podcast_soundcloud_en.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/30369418250.pdfIn PDF document text
    • http://bufiziwo.rf.gd/suvodumozutixutexevogizow.pdfIn PDF document text
    • http://surotatifezuxe.rf.gd/celine_dion_ashes_sheet_music.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_off0000d931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD931 5184 bytes
SHA-256: 4c541de8fe111fb1c4d442870e792e44c599faa5b7a74a847964780f7bf3e6f5
font_01_sfnt_off0000ead4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD4 10440 bytes
SHA-256: 064832b22d55aa1d05811ca02a550b9ea8ae71bed9654e36280a9321c66eaca2

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