Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bf51b63bdb12cbd…

MALICIOUS

PDF

68.0 KB Created: 2021-10-02 23:51:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: dec3c275aa3afd5a3a30124d9dc40ca9 SHA-1: 71b1b2d797de7a5f952212416c7af80eafc0fa8a SHA-256: 9bf51b63bdb12cbdfbce211e8a1f8d0ac9497ab26b421c8216f9829c3817665e
146 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a phishing lure, including being image-heavy with a clickable action trigger and a small file size. It contains numerous embedded URLs, one of which is `https://pixomot.ru/uplcv?utm_term=coming+forth+to+carry+me+home`, likely serving as the landing page for the phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://pixomot.ru/uplcv?utm_term=coming+forth+to+carry+me+home PDF link annotation
    • https://francois-daulte.com/ckfinder/userfiles/files/82418741183.pdfIn PDF document text
    • http://studiomanzetti.it/userfiles/files/nuxekove.pdfIn PDF document text
    • https://52fantasies.com/home/holly/public_html/ckfinder/userfiles/files/29153969502.pdfIn PDF document text
    • http://sadiqandsons.com/userfiles/files/26491493394.pdfIn PDF document text
    • http://jnmindia.com/outscapes/admin/ckeditor/uploads/ck/files/bizuwed.pdfIn PDF document text
    • https://gberwanda.com/gbe/useruploads/blogs/files/lonosiruvuz.pdfIn PDF document text
    • https://www.ccs-corporation.com/ckfinder/userfiles/files/vegesofamowirovefas.pdfIn PDF document text
    • https://mimpiindah2.com/contents/files/24521423909.pdfIn PDF document text
    • http://lnhaihui.com/userfiles/file/20210907145022_582761472.pdfIn PDF document text
    • http://barcelonahotel.vn/UpLoadFile/file/26594346327.pdfIn PDF document text
    • https://groupunsur1.com/contents/files/60829022533.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16133acfe3f365---lilubixofujoforari.pdfIn PDF document text
    • http://prosquash.by/data/12425716794.pdfIn PDF document text
    • http://st03.it/userfiles/files/fazumasibiseviwatewake.pdfIn PDF document text
    • http://seidels-mineralienwelt.de/images/uploaded/file/wobipapunudapuwoje.pdfIn PDF document text
    • http://suachuamaydemtien.biz/userfiles/file/pukodajofulowujukil.pdfIn PDF document text
    • http://www.yeosung21.or.kr/ckfinder/userfiles/files/1632530698.pdfIn PDF document text
    • https://karate2.cdmedia.pl/userfiles/file/90758686074.pdfIn PDF document text
    • http://dxqzx.com/ckfinder/userfiles/files/20210907_112512.pdfIn PDF document text
    • http://chaireyes.com/v15/Upload/file/2021923054202465.pdfIn PDF document text
    • http://palazzodiaz.com/userfiles/files/34535040625.pdfIn PDF document text
    • http://fioredda.com/userfiles/files/perupapufab.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/zaketatilerofijabawatep.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/66590956253.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_off0000aeee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEEE 10716 bytes
SHA-256: 22164e9d96ceb1905f803f8512d027684bcc35b6ca32e13e25296264f4d014e1
font_01_sfnt_off0000c765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC765 14072 bytes
SHA-256: db93e51580935900ab29ac42fb2bb6db9ba76893354b46ee69072d15568aff73
font_02_sfnt_off0000ea6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1