Malicious PDF — malware analysis report

Static analysis result for SHA-256 e60253ab3020aa31…

MALICIOUS

PDF

87.5 KB Created: 2021-06-02 06:43:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: fd8fefd23cc79d9ed9c6f6b84c0a1129 SHA-1: f74cea887ce4c68f87dbb697d736338c55fd3ffd SHA-256: e60253ab3020aa31867f28fa5f799877cc9bc10d662ff554b0ca9cd3d47b5987
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. ClamAV and ML classifiers indicate maliciousness, with the PDF_SEO_LINK_FARM heuristic specifically identifying a mass of external links. The embedded URLs likely lead to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://medvor.ru/pbw?utm_term=how+to+make+a+toga+from+a+fitted+sheet PDF link annotation
    • https://pomonomiwubexi.weebly.com/uploads/1/3/2/3/132302815/84d4ddbfe3b6.pdfIn PDF document text
    • https://rojanudase.weebly.com/uploads/1/3/0/9/130969060/5514188.pdfIn PDF document text
    • https://pasazobunev.weebly.com/uploads/1/3/4/6/134670772/mifibokemuzaxabeb.pdfIn PDF document text
    • https://javogukurajukip.weebly.com/uploads/1/3/4/2/134235542/9804551.pdfIn PDF document text
    • https://zukedobawalot.weebly.com/uploads/1/3/4/5/134526307/8441242.pdfIn PDF document text
    • https://zewujinewototi.weebly.com/uploads/1/3/4/7/134749630/popiboridofejo-tosikixuseg-wepat-rakiv.pdfIn PDF document text
    • https://fuwosijeven.weebly.com/uploads/1/3/0/7/130738701/8035179.pdfIn PDF document text
    • https://bemilinup.weebly.com/uploads/1/3/4/3/134390274/kuwejigesojarogokar.pdfIn PDF document text
    • https://vemisalisak.weebly.com/uploads/1/3/1/4/131437925/5413054.pdfIn PDF document text
    • https://rumejujosuzix.weebly.com/uploads/1/3/1/1/131164455/3998115.pdfIn PDF document text
    • https://luxoxika.weebly.com/uploads/1/3/4/8/134899107/fagonodizav-zozasem-werogupiwubax.pdfIn PDF document text
    • https://dizugupixaxagoj.weebly.com/uploads/1/3/4/4/134440249/sativ-tilek-falexuxusip-bibim.pdfIn PDF document text
    • https://jonusozulat.weebly.com/uploads/1/3/4/5/134523624/4161759.pdfIn PDF document text
    • https://supadebev.weebly.com/uploads/1/3/2/7/132712355/tujejopejudot_sizalika_renamigodu.pdfIn PDF document text
    • https://gazapaxinu.weebly.com/uploads/1/3/4/4/134475358/6865189.pdfIn PDF document text
    • https://tigasuzile.weebly.com/uploads/1/3/1/3/131379741/76d311.pdfIn PDF document text
    • https://jilefufut.weebly.com/uploads/1/3/4/1/134109271/a1c4cac6709.pdfIn PDF document text
    • https://lapazimosa.weebly.com/uploads/1/3/4/5/134526313/584254.pdfIn PDF document text
    • https://bidukupe.weebly.com/uploads/1/3/4/3/134348295/bodawenasi-lepapajepatu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pefagisunel.pbworks.com/w/file/fetch/144484932/cheapest_armored_car_gta_5_online.pdfIn PDF document text
    • http://sonopewobu.pbworks.com/w/file/fetch/144420978/malayalam_cooking_books_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb2daefa-d742-4495-915f-068cb51429b8/82358278072.pdfIn PDF document text
    • http://gemometis.pbworks.com/w/file/fetch/144483285/putuxo.pdfIn PDF document text
    • http://pugaxigodaka.pbworks.com/f/python_cookbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa9c2a66-30cd-4774-b3a4-07b5a1ea697e/royal_caribbean_alcohol_package_limit.pdfIn PDF document text
    • http://lakebimutep.pbworks.com/f/setimuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c6e2222-493f-4959-82af-380c6fe90b4a/40795849944.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/932a0abc-036e-48f9-9282-fd575538f7da/foundations_and_best_practices_in_early_childhood_education_3rd_edition.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_off00011692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11692 5408 bytes
SHA-256: 2800ce4f7ae66f2800c4b65899d494cea7bc3961a9178980890f6dc89405111a
font_01_sfnt_off000128dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128DD 11828 bytes
SHA-256: 8048f79a34e0bd101636302fc7c3ae3870fb56f3c48e8104a20f4f732d8395ff

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