Malicious PDF — malware analysis report

Static analysis result for SHA-256 8122f2a0ba768ac0…

MALICIOUS

PDF

76.4 KB Created: 2021-09-05 07:44:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2b7338eec53fcbc5a5e3ac617b3344a4 SHA-1: a102b8b822d91f00be87b02144cbb1140dfc3cd4 SHA-256: 8122f2a0ba768ac01a73ebbbd40132d7049e214133e095ac85c5832126321d72
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ML classifiers and ClamAV as malicious. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, suggesting a link farm or phishing lure. The document body is heavily obfuscated, preventing a clear understanding of its specific content, but the presence of external links and the overall detection profile indicate malicious intent, likely to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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 http://accessiblevehicleservices.com/userfiles/file/86766697527.pdf In PDF document text
    • http://oreade-breche.fr/userfiles/file/retotilo.pdfIn PDF document text
    • http://ccforum.kr/uploads/file/1623996953.pdfIn PDF document text
    • http://lionsmarsala.it/userfiles/files/79929518544.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/22748203282.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/kufafepujo.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/44b0f36a680413e6cb21ae5784557503/93478439502.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160824f34dbe30---38119801789.pdfIn PDF document text
    • http://terminsk.by/pics/files/15867715874.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/rojenikamabafawaze.pdfIn PDF document text
    • http://erdivigado.hu/userkepek/file/gabafunaxuv.pdfIn PDF document text
    • http://autohondl.cz/userfiles/file/kixumeverugagimul.pdfIn PDF document text
    • http://bulgankhangai.mn/userfiles/files/bupiwotawotu.pdfIn PDF document text
    • http://iamsong.vn/uploads/files/50877490106.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/97653699022.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ca87f8da03.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/jabatulinorenukipol.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d279c9960dd---nulasiwikefa.pdfIn PDF document text
    • https://dogathermalhotel.com/resimler/files/53821944938.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071229552118---76192365805.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/3223b96779a609e26beb0a96a6cc6a41/benenebiloguvetusef.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/b44cf49f8dbe418e41e1dbf12ff6e60d/63902566090.pdfIn PDF document text
    • https://legend-chang.com/UserFiles/files/zezajavorozajuso.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a56dadc1344---voxuropelulowi.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/8ca8bb1bae1d35ed231004f43ebe9ef8/17602708906.pdfIn PDF document text
    • http://magyaringatlanadatbazis.hu/dev/_user/file/vusolaxesimusalazige.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/e70bf3443b03de91eee495ebd254ac0b/46719954554.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a002079dd64---68380708809.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=statement+of+the+problem+of+school+dropout+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC746 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF58 16624 bytes
SHA-256: 1ae9e9dbdfd385d8f605bcd155d6a1f9b221b472424f9fe56505ca5e9f584804
font_02_sfnt_off000109d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D3 11108 bytes
SHA-256: 4c30e486dbd4fd202f1dc977d96a054e6eb1bd7eb498c9fde50db6498346fbcc

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