Malicious PDF — malware analysis report

Static analysis result for SHA-256 7098aefda32a8c74…

MALICIOUS

PDF

82.5 KB Created: 2021-10-08 04:06:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: b3066dbda86b1e6b810ec5de0d5af042 SHA-1: d6eed5e7312bfb9c501c2df14ad90e28a32d29c0 SHA-256: 7098aefda32a8c74303cc0f7541b8e195b296da204120bbc32c4ecd61208ec2b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains embedded JavaScript and a link farm pointing to compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to download a second-stage payload or redirect the user to a phishing site. The lure of a 'minecraft pc full version free download' is used to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://wastran.ru/uplcv?utm_term=minecraft+pc+full+version+free+download+2020 PDF link annotation
    • http://marketypik.pl/zdjecia/fck/file/83913420789.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/files/files/70237338565.pdfIn PDF document text
    • http://conomiya.com/images/uploadedimages/file/kipegonesularo.pdfIn PDF document text
    • http://directopinion.biz/uploads/FCK_files/file/2651862290.pdfIn PDF document text
    • https://namhunglogistic.vn/site/files/15711154092.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/6ql7c4rq4ip17ln2rkf6v1aj34/dirijemodukim.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/kizupejajuxafuvikovom.pdfIn PDF document text
    • https://smwebtechnology.com/arishayurveda.com/userfiles/file/54247789929.pdfIn PDF document text
    • http://www.alliance-bio.com/user_data/editor/ckfinder/core/connector/php/upload/files/94782748748.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/8234920781.pdfIn PDF document text
    • http://galettedesrois.hu/userfiles/file/vutokalusidafewobuvovep.pdfIn PDF document text
    • http://puginternational.com/ckfinder/userfiles/files/palatebuwe.pdfIn PDF document text
    • http://furniture83.com/upload/files/51208925029.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16159fdc00e3ab---19512876730.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/lixikimazidupewudifedilej.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021090517033076.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/3ac65a7adbbf6326c9e85cebb600d133/61048050786.pdfIn PDF document text
    • https://pushtypathshala.com/demo/aims/files/images/files/6747282043.pdfIn PDF document text
    • http://irvine.songhakbbq.com/uploads/files/xozoralux.pdfIn PDF document text
    • http://paintmaster.hu/js/ckfinder/userfiles/files/37085250469.pdfIn PDF document text
    • http://kiapelhrimov.cz/UserFiles/File/turafepifatar.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613f950b93a14---1252520762.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_off0000db25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB25 11100 bytes
SHA-256: 31883fa9265fd1904f06ee4e43414fce4628de208c0316e2d72f0d7022bb0b49
font_01_sfnt_off0000f544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF544 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D56 17980 bytes
SHA-256: 1153763d27bb3158b4f530a7b371e44b64d25a9ab53065bbdea0b5eb5f05e8a4

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