Malicious PDF — malware analysis report

Static analysis result for SHA-256 08073bd9f1da7386…

MALICIOUS

PDF

68.3 KB Created: 2021-09-28 02:35:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 88cc752e0854659318ac39e530ef06e3 SHA-1: a7020c591fb75c6882ca00826f22e67e82a2ef76 SHA-256: 08073bd9f1da7386e04d182c8d1a897508bca19ae662b3f32a3302604863d32e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to redirect users to malicious sites. The presence of an image-only lure further supports the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://irlanc.ru/uplcv?utm_term=how+to+find+the+password+for+your+hotspot PDF link annotation
    • https://ontogepszerviz.hu/editor_up/57910335299.pdfIn PDF document text
    • https://eledigitalpr.it/allegati/file/vokalazupilumok.pdfIn PDF document text
    • http://bdsps.org/slbdavbatala/userfiles/file/99362566953.pdfIn PDF document text
    • http://controlsystemco.com/cache/fck_files/file/79118680491.pdfIn PDF document text
    • http://www.mattig-accounting.bg/fisiere/file/xegabed.pdfIn PDF document text
    • https://inprovitpuertorico.com/ckfinder/userfiles/files/sezagizukamokotori.pdfIn PDF document text
    • http://ablerexthailand.com/userfiles/files/fulirasug.pdfIn PDF document text
    • http://skupka23.ru/upload/m/5301339106.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/9c4dba7174872e7d60ee63a633138b8f/8180392872.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614afb2ca4605---memepetifa.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/161463bbf7ee25---88159260521.pdfIn PDF document text
    • http://surmounttravel.com/userfiles/files/tamiwuligewunarejonelobuk.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/7vgt6nbh7j04ocidjdtikluuu5/21450437103.pdfIn PDF document text
    • https://sunkamalzemecilik.com/userfiles/file/katererisaz.pdfIn PDF document text
    • http://cavusofis.com/images_upload/files/venanekamumetemedod.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/161416d0f435e4---62129955828.pdfIn PDF document text
    • https://kirmatas.com/userfiles/file/96975862663.pdfIn PDF document text
    • http://rapet.hu/files/35147441170.pdfIn PDF document text
    • https://brod-plovdiv.com/images/mosipaxame.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/b113a806739b183c39c370838d8a712e/37952776323.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/90161448764.pdfIn PDF document text
    • https://cowichanmusicfestival.com/userfiles/file/69931220480.pdfIn PDF document text
    • http://www.udelimpa.es/ckfinder/userfiles/files/13857664841.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_off0000ae2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE2F 14376 bytes
SHA-256: eb0bac5245dee96b215d280b0738b6d88744a6b71f09e0687c28ff8a92661c69
font_01_sfnt_off0000d25a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD25A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ea71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA71 10840 bytes
SHA-256: d8a8ac86e600e92cce373cc3d150a17e8994ba7967965e6d049117c47f75fa2d

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