Malicious PDF — malware analysis report

Static analysis result for SHA-256 48970fb44f01399a…

MALICIOUS

PDF

85.3 KB Created: 2021-09-07 17:03:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0ecbfac8f94534dac271c77c48aa9a8d SHA-1: 4e135119974b215da6c382f15d42f613fd71bbb3 SHA-256: 48970fb44f01399a37599f267d4fba7c4abf073d5a143ee1c2271fa6ac0f1a71
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution attempt. The document body is unreadable binary data, but the presence of external URIs and the high detection scores indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://lnianemarzenie.pl/userfiles/file/jiwimejejitobupuvilaxu.pdf In PDF document text
    • http://valdhans.cz/userfiles/file/51535933069.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/ilogarud.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/kuzugidu.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/d8e5ebfd70f0fda0f2044f9709a649ec/3722112849.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/a717942294783ad7bc9bd39eb083d345/25747966724.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e557d923be---97626582313.pdfIn PDF document text
    • https://pestresolution.pt/site/upload/file/11203463284.pdfIn PDF document text
    • http://stinpo.com/ckfinder/userfiles/files/perelovogebutufega.pdfIn PDF document text
    • http://big-blue-bus.com/pics/fotos/1/file/kurasinukagavewanutuxujax.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/cf6d771fc66edf1a07302f6d5d78e2e6/50192673183.pdfIn PDF document text
    • https://simplehome.ro/ckfinder/userfiles/files/27048233365.pdfIn PDF document text
    • https://groupunsur2.com/contents//files/kekuxototikobuxumurex.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/5324179d756942e6cbc973867f581ae2/36020242404.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e98078e2834---zawijifetufepibiwi.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161343a961e4a6---95795791638.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16120441d6040b---35893602213.pdfPDF link annotation
    • https://mancomunidadvaldizarbe.com/userfiles/files/metaxipi.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607c86dfce04f---50804941104.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/eacfc2a07738e20b840cd799892a8143/79064234784.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/zomesemexifabidofez.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7fe2c45e9---54622672711.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c6defb927f8---vubuzorejelomokoxuvuju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=how+to+insert+a+page+of+a+pdf+into+wordPDF 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_off0000e9d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D9 17360 bytes
SHA-256: 3eebbeb63e6e046e8800b87e9c917de2ad8d30085f3fe979c6981a82122412dc
font_01_sfnt_off000116b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B3 10704 bytes
SHA-256: c4790ff09fdbb443f0ba67699b1a36f8320ce077d4cf5c59a6bf5f54e040caa1
font_02_sfnt_off00012f3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F3B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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