Malicious PDF — malware analysis report

Static analysis result for SHA-256 945188edc742b70d…

MALICIOUS

PDF

82.2 KB Created: 2021-09-07 16:31:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1cc73e64cf215bf441fc2a9355ddd733 SHA-1: cffec000de2786aa5b4dc05a1e3ecb398e8e7650 SHA-256: 945188edc742b70d1037fcea61b8e29153649ed687b4c2c01f93f349dfce53d5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing numerous links to external websites, many of which are hosted on compromised or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://ratco-hardware.com/Ups/files/sakexokolifozifotapetiliv.pdf In PDF document text
    • https://arabadvertise.com/userfiles/files/ronodatinef.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/2jsno52gtbqtfiptujtju0vrd3/80511854226.pdfIn PDF document text
    • https://krantiservice.com/ckfinder/userfiles/files/refasarorajubos.pdfIn PDF document text
    • http://rahwayhigh.com/clients/42761/File/dirigitomizujela.pdfIn PDF document text
    • http://abwpetersburg.com/uploads/files/fotaxuf.pdfIn PDF document text
    • http://93564497.com/userfiles/bawokin.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160779f167b200---tesunipifebibatore.pdfIn PDF document text
    • http://seamcc.com/UserFiles/files/7518968949.pdfIn PDF document text
    • http://hutnia.pl/userfiles/file/mokofugekub.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/jogose.pdfIn PDF document text
    • http://nofatrans-int.com/userfiles/file/18116846846.pdfIn PDF document text
    • http://bhttourist.com/upload/fckimagesfile/kujexafodite.pdfIn PDF document text
    • http://louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/72619103513.pdfIn PDF document text
    • http://gelikonline.ru/content/Files/kojokuxekasuruponamizodap.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/8f36920d7c17fee290f7190d184775aa/xededow.pdfIn PDF document text
    • http://cerezolorente.com/files/cerezolorente/_repo/file/labiduvixezosuwutigako.pdfIn PDF document text
    • http://xn--oy2b9bv81anouola.com/upload/file/202108202159251573.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608205cb9fe91---1755673390.pdfIn PDF document text
    • https://mzlpro.com/web/img/podborky/files/56927154994.pdfIn PDF document text
    • https://clinicscrm.com/img/files/lubimopazozu.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/27146114417.pdfIn PDF document text
    • https://biblioteka-koneck.pl/ckfinder/userfiles/files/58323327957.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078576a333ff---87090167350.pdfIn PDF document text
    • http://chnli.tw/CKEdit/upload/files/27135848387.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=role+d%27un+animateur+de+projet+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_off0000da6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6F 19220 bytes
SHA-256: 730579193a70b1f47ab1fbc8fb8dfdf69a70d26700710eb50518e8a89ac68640
font_01_sfnt_off00010a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A13 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001222a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1222A 10800 bytes
SHA-256: beb8e3a14a1022b6849dd1fdb4b58af1078ba97d2a5c7d066c46df92e8f4d9b7

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