Malicious PDF — malware analysis report

Static analysis result for SHA-256 868f201649a06c8f…

MALICIOUS

PDF

67.5 KB Created: 2021-09-25 19:45:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 98918757f77fd0e3572dee4ed4ec3508 SHA-1: a7f289a4bd68589fcf05f2f4262573bb75b1d2e0 SHA-256: 868f201649a06c8f2cec31975db5354198bf75e03e7b600161eabbe43114e429
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV also detecting it as a phishing trojan. The document employs a common screenshot lure, presenting a non-interactive image to entice users to click embedded links. These links, such as 'https://garglob.ru/uplcv?utm_term=the+tomorrow+war+movie+download+tamil', are hosted on disposable domains and compromised CMS upload directories, suggesting a phishing or malware distribution campaign. No scripts were extracted, but the PDF structure and link farm indicate a malicious intent to redirect users to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 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.
  • 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://garglob.ru/uplcv?utm_term=the+tomorrow+war+movie+download+tamil PDF link annotation
    • http://pcccphucvinh.com/upload/files/mamiwotepali.pdfIn PDF document text
    • http://4seasonstours.in/userfiles/file/sagademetopose.pdfIn PDF document text
    • http://deltools.com/userfiles/file/kovategikebodinoxusux.pdfIn PDF document text
    • https://liho.cz/UserFiles/File/javatofujadifivawosa.pdfIn PDF document text
    • https://linker.tw/files/39513876456.pdfIn PDF document text
    • https://www.domaine-vrignaud.com/ckfinder/userfiles/files/famib.pdfIn PDF document text
    • https://umutisi.com/umut/upload/files/lukedufezopig.pdfIn PDF document text
    • http://ajarnveerapong.com/UserFiles/file/18496522813.pdfIn PDF document text
    • https://ilexgold.com/app/webroot/files/userfiles/files/lakeguzasapipubasoxubana.pdfIn PDF document text
    • http://hbaoge.com/upload/files/81579711565.pdfIn PDF document text
    • http://ipublicity.cz/data/file/99745276683.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161465309e913d---64169024660.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/a2420da6ab82c9001be308b8d75978f3/paxaxevewazabajumoxujubo.pdfIn PDF document text
    • https://migger.dk/userimages/file/fezosebogaripifadoxu.pdfIn PDF document text
    • https://cncostruzioni.com/userfiles/file/10189918979.pdfIn PDF document text
    • http://sushi-belovo.ru/files/57937106251.pdfIn PDF document text
    • http://dlastudenta.org/Upload/file/7463464757.pdfIn PDF document text
    • http://brandweeramsterdamamstellanden.nl/userfiles/file/70372586324.pdfIn PDF document text
    • https://ctcitsupport.com/media/files/78459682851.pdfIn PDF document text
    • http://shlawllc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/33180546337.pdfIn PDF document text
    • https://asken.as/bilder/file/rowulelutisuxeludokefevu.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1614544530a2de---90606613238.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_off0000acd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACD8 10460 bytes
SHA-256: 0222ddb7a4e07026813bc3cb56bf2a15b0daedf635a7b345295405597e53865f
font_01_sfnt_off0000c469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC469 14500 bytes
SHA-256: 828a6cf9e299c87921666aa391484a863684b5ae450c1a2812d22b0f9224c907
font_02_sfnt_off0000e83b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE83B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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