Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ed1382a94426777…

MALICIOUS

PDF

67.7 KB Created: 2021-09-14 02:06:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 03c93fa6c87246c6aaeee0de7056338a SHA-1: ba2c21a123365e635cb7bf2fa45354abb731f28b SHA-256: 9ed1382a94426777640654b58f003da12c57b6105929ec3099ef22f20491acc1
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF exhibits characteristics of a phishing lure, including being image-heavy with minimal text and containing multiple external links. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs suggests the document is intended to redirect users to potentially malicious websites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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
  • 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://infrive.ru/uplcv?utm_term=apps+you+can+play+without+internet PDF link annotation
    • http://baschin-heizung.de/meineBilderAlbertGrundschule/file/vexasikarubumopif.pdfIn PDF document text
    • http://murzilka.biz/images/uploads/file/tigor.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/kijodafiwejeluvujutiziv.pdfIn PDF document text
    • https://assignmentmart.com/ckfinder/userfiles/files/96360534845.pdfIn PDF document text
    • http://chickendaylacrescenta.com/uploads/files/19209255999.pdfIn PDF document text
    • http://gocep.org/data/userfiles/files/wikuvex.pdfIn PDF document text
    • http://macierz-grodziec.org/files/file/basuf.pdfIn PDF document text
    • http://bibikid.ru/upload/34230349255.pdfIn PDF document text
    • http://hstairan.com/FCKeditor/editor/filemanager/connectors/php/userfiles/file/7170962407.pdfIn PDF document text
    • http://xn--eyt274i.com/upload/files/xokujurajuxutavo.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135b68ce7ffb---nitojegudomev.pdfIn PDF document text
    • http://surmounttravel.com/userfiles/files/dafositigudukasuvixu.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/wemosisuxiditokanokolukex.pdfIn PDF document text
    • http://0048.pl/48files/file/lekigusefuwisufasup.pdfIn PDF document text
    • https://casaalu.com/luutru/files/jowapedok.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/19728553442.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c4e515c476---69533128193.pdfIn PDF document text
    • https://cemb.ca/upload/editor/file/6387288432.pdfIn PDF document text
    • http://lemonsport.hu/upload/file/56986286485.pdfIn PDF document text
    • https://inprovitcaribe.com/ckfinder/userfiles/files/24523916464.pdfIn PDF document text
    • http://peak-experience-europe.com/images/blog/file/64600189086.pdfIn PDF document text
    • http://uticachemical.com/files/upload/files/nikov.pdfIn PDF document text
    • http://matchonusa.com/uploads/files/28993490868.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_off0000ad6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD6F 14156 bytes
SHA-256: a89a98a89b1522565968ee1acf95588bbe6835ee6fbf13b5ad07fc59689a14a9
font_01_sfnt_off0000d061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD061 10752 bytes
SHA-256: ed0e705670d0925ef5f0cc99799093a9fccefcc864a2af4c1331e03cc5e3e6ba
font_02_sfnt_off0000e938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE938 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1