Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b1747ad42783366…

MALICIOUS

PDF

108.7 KB Created: 2021-07-18 18:45:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: adf8c3426ed233a4caf9d90eff85f2c6 SHA-1: 1aabeee680c3c6fa81fb099f71cc0de4ffcd12c6 SHA-256: 7b1747ad4278336680afdbf9bbc678fd176439140bb92748cfc054d86139a994
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links pointing to external websites, many of which appear to be hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users. The PDF's structure and the presence of embedded links indicate it is likely used as a lure in a phishing campaign, potentially leading to further malware downloads or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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 http://www.aadhar-interior.com/userfiles/file/banufogapawirolalo.pdf In PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b77d64897bb---soloviwenaxebivubigito.pdfIn PDF document text
    • https://suma.ca/upload/editor/file/6377949959.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/9p7pghvs75anhm3lq2l1vsmirc/82922204767.pdfIn PDF document text
    • http://septumdent.com/img/userfiles/files/47754369989.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160920efe87d4b---68495396832.pdfIn PDF document text
    • http://portaldo.eu/contenuti/upload/file/63954795370.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/ac1bce94b51d3219e8ae043d9e8a01e6/2270889854.pdfIn PDF document text
    • http://salon-urody-bellis.pl/images/file/lekiriwuvisuz.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608115546181c---lupif.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ca3c943ce---33676167712.pdfIn PDF document text
    • http://vallovin.it/userfiles/files/luvasefenewukisukewew.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/39bfc8653c39acc2a2354992727cffc6/kefubexeroboxovozapani.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/b4d3584199b3a07e95b26294c13f1068/piniwizonapetolupuraro.pdfIn PDF document text
    • http://www.aluvascientific.com/UserFiles/file/sunefunexetosep.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/87558178337.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a43512637---35549383353.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/cae66340e9ba220e16476a9ba9a22038/wuzutevipurawajusev.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/9d6cd9e7c74677bf1f6201a41b3f1a66/datojoxupiwonirit.pdfIn PDF document text
    • http://cestovni-postylka.eu/userfiles/file/tagubuwenomozujiwada.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160783b62edef6---sojuxebajajemaxukobas.pdfIn PDF document text
    • https://signika.pl/Upload/file/27516375279.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=the+lion+witch+and+the+wardrobe+authorPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000147f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147F6 10588 bytes
SHA-256: 0600cc1a48e0140aef0ac0a22bb249da203418dbc2df022b958d8515fc57610e
font_01_sfnt_off00016017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16017 17396 bytes
SHA-256: 7d85a0a34f9089e25298c07cff14db72d5462efc072c31c719f35e7a04fca54f
font_02_sfnt_off00018d45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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