Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3f006aaaec8a7da…

MALICIOUS

PDF

74.2 KB Created: 2021-09-17 12:09:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: affd7b9a1a6fe942e5eddc36a413a2dc SHA-1: 33db42f6f45ef50ee2458eb2ef38fd2010ddab11 SHA-256: f3f006aaaec8a7da3453c6ca9d7fde4b02e7fbc9a61734b7c258327a7cd30bf2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Numerous URLs are embedded, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://garglob.ru/uplcv?utm_term=image+to+excel+online+ocr PDF link annotation
    • http://nomayaku.com/userfiles/file/17624693360.pdfIn PDF document text
    • https://www.bosingels.nl/ckfinder/userfiles/files/zapixaruribukikujodabujag.pdfIn PDF document text
    • https://spotiverify.com/ci/userfiles/files/58947808161.pdfIn PDF document text
    • https://newegys.egyseg.eu/ckfinder/userfiles/files/tobaxinafi.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d27f0c8425---81672792935.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/12598698809.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/87ca479a6d42321f18efdd0220101beb/99370162313.pdfIn PDF document text
    • http://lignumweb.com/site/webroot/uploads/files/52284000969.pdfIn PDF document text
    • https://inarsindbari.org/uploads/87165479876.pdfIn PDF document text
    • http://angelofthewinds.net/ckfinder/userfiles/files/24704689344.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/161409980be4e7---bumabaresefepu.pdfIn PDF document text
    • http://n-production.com/upload/fckeditor/file/wivuse.pdfIn PDF document text
    • http://delfosventures.net/userfiles/files/73667697232.pdfIn PDF document text
    • http://twozonechickenlasvegas.com/uploads/files/31787932286.pdfIn PDF document text
    • https://campfun.myhost888.com/upload/ckeditor/files/68879173646.pdfIn PDF document text
    • http://bainihu.com/upfiles/editor/files/69452308380.pdfIn PDF document text
    • https://www.alugutader.fr/ckfinder/userfiles/files/24725574499.pdfIn PDF document text
    • http://cana.vn/uploads/userfiles/file/74992665361.pdfIn PDF document text
    • http://firewaterdamagedfw.com/test/fckeditor/uploadfiles/file/53037023996.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16136176682c25---mowajebapa.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16143920b77ad7---73519590250.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_off0000bed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBED1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d6e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E3 17560 bytes
SHA-256: 983df1a37b2f3daf7cea85f59f2d56493989884153ec2c2424c2875a8096fd32
font_02_sfnt_off00010469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10469 10456 bytes
SHA-256: 718f0d4eaa2f75b6329688c9c92e37a53b46af2b4c401151d3075bb47c9fc5e8