Malicious PDF — malware analysis report

Static analysis result for SHA-256 0af33d0b2e1a04e2…

MALICIOUS

PDF

68.2 KB Created: 2021-09-16 05:23:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 604079f1878104fc3666d458b8c99412 SHA-1: 51abcf08a1e061cbc072d6f7b607d860bf331866 SHA-256: 0af33d0b2e1a04e243f3b10b695c5efb270a75bdc4bf8974df6abbb2e85a3065
146 Risk Score

Malware Insights

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

The PDF is identified as a phishing lure due to its image-only nature and embedded clickable action, a common tactic to deceive users. The heuristic 'PDF_IMAGE_LURE' and ClamAV detection strongly indicate malicious intent. The document contains numerous external URLs, with 'https://oniceh.ru/uplcv?utm_term=free+followers+no+verification' being a primary indicator of a potential phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9851

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 68 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=free+followers+no+verification PDF link annotation
    • http://mp-journal.com/media/file/kabadozasuduvipozejub.pdfIn PDF document text
    • https://myclubowners.travelenvogue.com/userfiles/files/50320157050.pdfIn PDF document text
    • http://jiendurancecoaching.com/ckfinder/userfiles/files/bonodesab.pdfIn PDF document text
    • http://turnwealthy.com/ckfinder/userfiles/files/53779423991.pdfIn PDF document text
    • https://gibidesign.com/fckfiles/file/73913879121.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/nirulamufadovetonuwuvi.pdfIn PDF document text
    • http://ettorebelfioreliutaio.it/userfiles/files/mamazugujezodazire.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136662dc3148---1159841175.pdfIn PDF document text
    • https://mai-avto.ru/upload_files/file/maluziviwigufida.pdfIn PDF document text
    • https://hilanguage-com-tw.triangle-design.com/files/siwadobetanodevopabonif.pdfIn PDF document text
    • http://wsmr.us/userfiles/file/70028187024.pdfIn PDF document text
    • https://allmassage.net/upload/file/20210916095138.pdfIn PDF document text
    • http://werkschoenenverkoop.nl/images/docman/files/17042145396.pdfIn PDF document text
    • http://rpsbchamber.org/editorData/file/mapolavelogetuf.pdfIn PDF document text
    • http://fitsiluet.cz/data/file/widexiniwizise.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/dosuvakubupozebo.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613e7f3e2de6d---39097876556.pdfIn PDF document text
    • http://change4best.ru/upload/file/latowesatabolasimeke.pdfIn PDF document text
    • https://legend-chang.com/UserFiles/files/89338063601.pdfIn PDF document text
    • http://boatmonies.com/uploads/files/zenezewosap.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/6378587058.pdfIn PDF document text
    • http://stainless-faucet.com/uploads/htmlupload/files/zesejasuwi.pdfIn PDF document text
    • http://gadkowski.pl/repository/filemanager/file/78832684074.pdfIn PDF document text
    • https://confidence-ist.com/ckfinder/userfiles/files/36035072124.pdfIn PDF document text
    • http://ildongwire.com/userfiles/file/86049146967.pdfIn PDF document text
    • http://www.gpkoaee.ru/ckfinder/userfiles/files/nadatovud.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_off0000b100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB100 14024 bytes
SHA-256: 07da2298e9822e97489993a6ac5abe981944ad3c57703d252bc5798907b250ff
font_01_sfnt_off0000d32a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD32A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eb41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB41 10460 bytes
SHA-256: 50037bb3be85f221ff97ab261ca4fe5b81cf1f1198573e604513880f571a60c6