Malicious PDF — malware analysis report

Static analysis result for SHA-256 d97ef4fa12893249…

MALICIOUS

PDF

103.2 KB Created: 2021-06-14 09:41:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 47c9c32c0ed523abc0fd8696fccc58a6 SHA-1: 7f34ec6dde19e7dc379f239a372ca9ebfc96b3a8 SHA-256: d97ef4fa12893249ce5b3a2c0cb9ed913445edd84cd3b21284be167806df707c
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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://cructi.ru/uplcv?utm_term=battlefront+2+2005+best+mods PDF link annotation
    • http://bigxra.com/uploadfile/file/2021060813033973499.pdfIn PDF document text
    • https://techson-cctv.com/upload/file/tujobijabetizezinum.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608382d68b002---99209752692.pdfIn PDF document text
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/iqmmde5pfce97t55k4aibtrcrf/75045535204.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/3iv9kiisv0q3dqnsa29g2jrlo3/jinizuvezagijetuku.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/42ce0ib44419jmtcph6nugqau8/mitel.pdfIn PDF document text
    • http://18554080.com/userfiles/file/foxujomigajajugivewupe.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffb556c606---bunafelete.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/vavusekedogodode.pdfIn PDF document text
    • http://ayhancevik.com/images_upload/files/94148880118.pdfIn PDF document text
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/bf56e425f7eacbe118bce71748e19abc/menezivolosase.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/83f700b7fffca29283928344b07fdea7/97628723526.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606e9a58139a5---pipixosijutumoza.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16090f47b5f913---52349287356.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/78j1nivo8lm9hnfccqbmi5je0e/18174886253.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/5f8ae2646803e600d89d1a2bcd9de04a/tiroxesavuzoxuse.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000129dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129DD 5380 bytes
SHA-256: b39ae38fe9b517b9b6590bdde463799811598e08baf3140034253f230ea63669
font_01_sfnt_off00013bfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BFC 1772 bytes
SHA-256: acc8e4fc1fa6fc0e1ad702546ec63c54288dadfa1d6d375f487903e315e5a1fb
font_02_sfnt_off000144af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144AF 10940 bytes
SHA-256: 8625759bb202b01781772c1cdc826e9fc62a5572466b3a591208ba980c81b720
font_03_sfnt_off00016a71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A71 16588 bytes
SHA-256: b83ff08cdbc49e7cfef8cbe45843382833facc0e05e545e08fb7eca07dec9369
font_04_sfnt_off0001808a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1808A 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

Open this report in the interactive analyzer, or submit your own file for analysis.