Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc0d0a6124774dea…

MALICIOUS

PDF

79.6 KB Created: 2021-09-14 08:54:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e1c2846c4b16d04401e89ee11a42c8bf SHA-1: b0cd71416ba5bb13e661456f6fd265ba58b182e5 SHA-256: fc0d0a6124774dea6fc3dd578f780e123dd1e7767e73b63c14177f733a78940e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to various domains, suggesting a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high volume of links on disposable hosting, reinforcing the phishing or malware distribution intent. No scripts were extracted, but the presence of many external URIs is a strong indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://crewmak.ru/uplcv?utm_term=snaptube+official+website PDF link annotation
    • http://srtprogetti.eu/userfiles/files/76672254985.pdfIn PDF document text
    • http://gesundezellen.de/neu/userfiles/file/73087652163.pdfIn PDF document text
    • http://avandcie-energy.com/ckfinder/userfiles/files/nosutizubosivi.pdfIn PDF document text
    • http://timnhanhonline.net/upload/files/48380148983.pdfIn PDF document text
    • https://renault-service.com/userfiles/35976585731.pdfIn PDF document text
    • https://eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/boverorigumitimiwizi.pdfIn PDF document text
    • http://sspvjd.com/FileData/ckfinder/files/20210914_45D6B07342D390FB.pdfIn PDF document text
    • https://ascend.sut.ac.th/ce/2017/src/plugins/ckfinder/userfiles/files/44167497818.pdfIn PDF document text
    • https://yukkumpulgroup2.com/contents/files/64622908299.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16131f9d52c095---modufasimarurodirudinima.pdfIn PDF document text
    • https://www.thaiahpa.com/flash/files/denuperujafizerav.pdfIn PDF document text
    • https://asiahealthcaredentalcentre.com/ckfinder/userfiles/files/83059749463.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/61026547804.pdfIn PDF document text
    • http://abwalabamaave.com/uploads/files/84840945917.pdfIn PDF document text
    • https://cfi-registration.amyhalter.com/buzzboxgift/img/userfiles/files/74340390700.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/78979423541.pdfIn PDF document text
    • https://costarica4d.com/contents/files/35809546806.pdfIn PDF document text
    • http://wohntraumgmbh.at/muxugawusapit.pdfIn PDF document text
    • http://dlzj.net/upload/files/20210913074718881615.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/030144162639.pdfIn PDF document text
    • http://meta-min.com/files/45391707752.pdfIn PDF document text
    • https://gyn-koe70.de/obrazky/file/9742257689.pdfIn PDF document text
    • https://pinyardim.com/calisma2/files/uploads/16743674072.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/75532229130.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://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_off0000d113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD113 18052 bytes
SHA-256: 536b38fa89489373ebf2bacaa2e3db852604478ba9931ecde2561e2b9999c2ed
font_01_sfnt_off0000fff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11810 10772 bytes
SHA-256: 573ec418c1fd9699e0d86210e48b4e8c9f47f7eaa628bfa2028c32f85e58683c