Malicious PDF — malware analysis report

Static analysis result for SHA-256 baa09c890db9f428…

MALICIOUS

PDF

68.0 KB Created: 2021-10-03 08:44:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: f7b1b44e814e6b2e3e2671f6ebd09ffa SHA-1: 16dbf8afa34c5626a4af9db2efea6616079255bb SHA-256: baa09c890db9f428136dc932335d624c09e26b46d73b186533f70de5bab47518
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only document with an action trigger, typical of a phishing lure. Heuristics indicate it's a link farm on disposable hosting, with numerous embedded URLs pointing to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for distributing further malware or conducting phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://retailcop.ca/files/81815430452.pdf In PDF document text
    • http://www.hebrewforreadingcomprehension.com/content/voxugojiwesurawibegeja.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///64627443614.pdfIn PDF document text
    • http://imaginove.eu/data/Files/gusodiniraji.pdfIn PDF document text
    • http://zjhywt.com/images/upload/File/71820550366.pdfIn PDF document text
    • http://veitali.com/upload/files/41534009797.pdfIn PDF document text
    • http://americasbestwingsbeltsville.com/uploads/files/35209954483.pdfIn PDF document text
    • http://geologicatoscana.eu/userfiles/files/gezidobisa.pdfIn PDF document text
    • https://jpjplumbingandheating.com/FCKeditor/file/14609534569.pdfIn PDF document text
    • http://demkapi.com/resimler/files/67634964629.pdfIn PDF document text
    • http://ustunongel.com/image/files/71274670045.pdfIn PDF document text
    • http://design-klasse.de/ckfinder/userfiles/files/bavasixefavor.pdfIn PDF document text
    • http://alphamarino.kz/images/news/file/mofareluluzovaniduk.pdfIn PDF document text
    • http://elai.kz/upload/2021/09files/210918051138956121z54db.pdfIn PDF document text
    • http://azinsaghf.com/cache/fck_files/file/padagolirubizugobekatuz.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/zuwuzosevupibet.pdfIn PDF document text
    • http://artediapharma.com/upload/files/vavukatusow.pdfIn PDF document text
    • http://nandishoverseas.com/UserFiles/File/tumuzifudifeverar.pdfIn PDF document text
    • https://petpetmates.com/files/editor/file/39646184063.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/30d91e64f41099491ea710881cfc5b9c/zowesodujikajul.pdfIn PDF document text
    • http://hsaltsj.com/uploads/files/fesidatupelevoriforujixa.pdfIn PDF document text
    • http://officinedesign.it/userfiles/files/nutesarezopemomi.pdfIn PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/noladibapej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=wanted+2008+full+movie+123moviesPDF 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_off0000ace5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACE5 11248 bytes
SHA-256: 0562a87acaf832c9497716f27530d74edb787d9c30f615ae68db04b1c5c1255d
font_01_sfnt_off0000c772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC772 14324 bytes
SHA-256: 6b855fcc9c4b7088253a2c50e6af01ae467f90003930c979b33167a22d92d434
font_02_sfnt_off0000eac4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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