Malicious PDF — malware analysis report

Static analysis result for SHA-256 02608842c7313da1…

MALICIOUS

PDF

73.1 KB Created: 2021-10-03 02:02:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: e85acac2e64212698f9a4c8498c2dd51 SHA-1: 3e4e15ad7be376900846f0d9d5c1d138972be743 SHA-256: 02608842c7313da1ebce1df5de637b8d7b187c95180a979c6e5b2b52ca58698c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://aviatroglo.fr/IMG/file/63212527777.pdf In PDF document text
    • https://serrechevalier-skifun.com/imagesfile/20778143591.pdfIn PDF document text
    • http://eur-idea.com/userfiles/file/kobekaperiratoxutimixeja.pdfIn PDF document text
    • http://reliancefla.com/admin/images/file/5420002331.pdfIn PDF document text
    • http://qdxqw.com/uploadfile/file/volazedigigugevi.pdfIn PDF document text
    • https://elger.cz/fckphotos/file/37701200944.pdfIn PDF document text
    • http://jubileejec.com/userfiles/files/luxaxizenudigane.pdfIn PDF document text
    • http://xn----7sbbbizu2bxaod.xn--p1ai/userfiles/file/39587250948.pdfIn PDF document text
    • http://floralojistik.com/userfiles/file/91135461316.pdfIn PDF document text
    • https://fceresources.com/ckfinder/userfiles/files/61326086866.pdfIn PDF document text
    • http://deborahkay.com/ckfinder/userfiles/files/rulutelul.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614df3ee86cbb---pemegasalawexixegebo.pdfIn PDF document text
    • http://xedaptap.net/userfiles/file/bixijaketogev.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/fakunalosejapo.pdfIn PDF document text
    • https://nguyenhungstone.com/uploads/image/files/38530737950.pdfIn PDF document text
    • http://gocchame.vn/app/webroot/img/uploads/files/94908941326.pdfIn PDF document text
    • http://sportingclubalbinia.eu/userfiles/files/31291754974.pdfIn PDF document text
    • https://nitm.ac.in/nitmeghalaya/ckfinder/userfiles/files/39876151538.pdfIn PDF document text
    • https://santaclara.com/wysiwygfiles/file/tanowekapufijo.pdfIn PDF document text
    • http://7m-shop.com/userfiles/file/54634010132.pdfIn PDF document text
    • https://yaofangpeixun.com/upload/files/bovupab.pdfIn PDF document text
    • https://sunwayhk.com/louis/STARKGROUP/ckfinder/userfiles/files/wekapanikizaj.pdfIn PDF document text
    • http://hmed.vn/upload/files/14800451367.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/7dh6g69pdis1skpbnj0i0e1bcm/23381804890.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=windows+10+iso+file+download+with+activatorPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB302 18708 bytes
SHA-256: f5ea4c0c8f250f22662f71d1334d9ac5e5f773698f1186ff49b17b1b13c390b4
font_01_sfnt_off0000e3d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D9 10892 bytes
SHA-256: 2b9958be147303d2cde1527964b8c9af6b5be7900e63eba4c44722e9e6840da3
font_02_sfnt_off0000fd17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD17 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1