Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f922020a27a40a6…

MALICIOUS

PDF

87.5 KB Created: 2021-09-09 09:11:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8b41141241adf5bf957d11d606f9d4b9 SHA-1: dda5f9cb6c4b183365981ca9e9099edb1ae1a686 SHA-256: 0f922020a27a40a6a263944784b8c945396080f74feae1f56e00a2fa3da434cf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of external URI heuristics further supports the attack pattern of luring users to potentially malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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 http://dlevitin.ru/fck_editor_files/files/33451890412.pdf In PDF document text
    • http://mptech.vn/ckfinder/userfiles/files/13787210412.pdfIn PDF document text
    • http://gibisch.org/files/files/30994822014.pdfIn PDF document text
    • http://dealershop.es/userfiles/file/84890863067.pdfIn PDF document text
    • http://mimarkamilozkartal.com/userfiles/files/tidavekuvogedugizajibobo.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/6f337bd83f113997db8ff77104368a77/tezamasidopivivixitu.pdfIn PDF document text
    • http://akvari-um.ru/userfiles/file/kotuxetaxavovorazuxibewit.pdfIn PDF document text
    • http://f-okinawa.com/img/tmp/file/60495590848.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161377098d1ef9---10858280196.pdfIn PDF document text
    • http://hyunshin.net/userfiles/file/pumolutekud.pdfIn PDF document text
    • http://studio-orlandini.com/userfiles/files/11293205531.pdfIn PDF document text
    • http://women-for-marriage.com/ckfinder/userfiles/files/dojitidesexaroverelubasi.pdfIn PDF document text
    • http://phyllisrubensteinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/53650103184.pdfIn PDF document text
    • https://dortmundpools.com/contents/files/zugijukovusonixaxiboze.pdfIn PDF document text
    • http://mentor-tutor.com/newGroserLikeProject/uploads/files/29687810779.pdfIn PDF document text
    • http://veterky.ru/ckfinder/userfiles/files/sasiwemetemufawemogujox.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138034aeb9a3---favunolufevogiwitike.pdfIn PDF document text
    • https://topclassgardening.nl/images/file/52812205734.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/49699319872.pdfIn PDF document text
    • http://xn----otbbfbbknchz.xn--p1ai/sadm_files/85974318985.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/23263132754.pdfIn PDF document text
    • https://yaslibakicisi.net/userfiles/file/20793126029.pdfIn PDF document text
    • https://anctools.com/ckfinder/userfiles/files/seripilapeg.pdfIn PDF document text
    • http://builderall.info/userfiles/file/rofokunomopaku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=cars+fast+as+lightning+download+apkPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A0 16600 bytes
SHA-256: 270df36f7fe66a27b93e7983f6d56d39dc0af6f9c8b3480978095e9cc16ecbd4
font_02_sfnt_off00011b9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9F 18148 bytes
SHA-256: 9b44dbfbdbb1e2156d72d8b122e0642621d400ff4569f49364ca5811daee6fe6
font_03_sfnt_off00013768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13768 10856 bytes
SHA-256: 9dd30da9e56f9ce44b21f2dfd9e17cd5403e76e2c18d05a002b731cd30e5d668

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