Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccb65d0f68604ccb…

MALICIOUS

PDF

69.0 KB Created: 2021-09-16 10:24:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d5577139ca9453af7130fed5419264a5 SHA-1: 83e63456a5461d69362b16a0294ef3a51d6bba25 SHA-256: ccb65d0f68604ccb8cf597e57d104daaafd4c7ee02417d7d76543826081c6f3c
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains an embedded URI and is structured as a link farm on disposable hosting, suggesting an attempt to redirect users to malicious sites. The document body is heavily obfuscated and appears to be an image-based lure, typical of phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 69 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://oniceh.ru/uplcv?utm_term=best+smart+tv+launcher PDF link annotation
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/fb8d6ea54fc8d9f5b5ab783fa87110f0/30264333337.pdfIn PDF document text
    • http://incomingmakedonia.com/files/files/68037390229.pdfIn PDF document text
    • https://www.kuwaitpolyurethane.com/ckfinder/userfiles/files/lixoropuzageguwo.pdfIn PDF document text
    • https://etravelbox.com/scgtest/team-explore/uploads/files/49636697455.pdfIn PDF document text
    • http://agapetown.net/ckfinder/userfiles/files/mororadigomirevafasom.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/81278358739.pdfIn PDF document text
    • http://ncdesign.it/userfiles/files/25227468344.pdfIn PDF document text
    • https://kolegium.inaheart.org/upload/files/86138066056.pdfIn PDF document text
    • https://gamma-electronics-eg.com/userfiles/files/29275679415.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.com/upload/files/30363777069.pdfIn PDF document text
    • http://nationalherbo.com/userfiles/file/daropesedunasibukali.pdfIn PDF document text
    • http://saipanbooking.com/FileData/ckfinder/files/20210914_A73B6E41354A659B.pdfIn PDF document text
    • https://arnetbilgisayar.com/upload/ckfinder/files/mofofazaga.pdfIn PDF document text
    • http://joltiy.ru/uploads/files/49772178950.pdfIn PDF document text
    • http://jeanchapleau.com/userfiles/file/puzuvubatafuxetaga.pdfIn PDF document text
    • https://linhquan-group.com/upload/ck/files/53569626312.pdfIn PDF document text
    • http://skupka54.ru/upload/m/nizajula.pdfIn PDF document text
    • http://ledins.lv/cms/file/vukevogusapibemunij.pdfIn PDF document text
    • https://akproauto.net/nbloom/fckuploads/file/tuwaxijelepifudavavarir.pdfIn PDF document text
    • http://nhungbaithuocnam.com/img-tvdl/files/41292349367.pdfIn PDF document text
    • https://areopag.ru/sites/default/files/uploads/96086922300.pdfIn PDF document text
    • http://ever0036.com/assets/uploads/ckedit/files/20210914135310.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/80241036426.pdfIn PDF document text
    • http://cnc-soustruzeni.cz/files/file/75580061132.pdfIn PDF document text
    • http://markjfox.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/85574769489.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_off0000b200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB200 14208 bytes
SHA-256: f48a5f1fd518d6656dcd33df97ddc2d859de83e221d4d76e051e5780f2cc8dcc
font_01_sfnt_off0000d51c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD51C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ed33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED33 10500 bytes
SHA-256: 12da3517595ef35caa9e0d24f8dcec5c67c191d0de04b287fd433d79ae0670e5