Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c805ea49abf02b2…

MALICIOUS

PDF

88.9 KB Created: 2021-06-30 06:45:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: ba0dc569b9ed2dddd891992f656e6fbc SHA-1: 0130916832a271ab19faae36637debd4484cf31f SHA-256: 5c805ea49abf02b235f09a8ace940b5f6d2a70ab819900d37634ebc65915ca5c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to numerous compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and numerous external links are consistent with a malicious PDF designed to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/461a41f8b6db463b19b90df7b072ca8e/mofomuwopowuxaladapa.pdf In PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/36d3aa72a89779e2b5ae531d4edc96a0/rerujub.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d4d6b6461---59547391884.pdfIn PDF document text
    • http://dakmet.pl/upload/zabetifemesi.pdfIn PDF document text
    • http://nhandieurangmuoi.com/ckfinder/userfiles/files/73377475792.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079168089a9c---noleseg.pdfIn PDF document text
    • http://goldcoil.com/uploadfiles/files/39745771672.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/30301156752.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/d22779216c224dd4ba51d7831fe78f75/gumutamek.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/be50427c95ac4282ed566b7eadbe748f/kijetogugume.pdfIn PDF document text
    • http://blessingsngo.in/userfiles/files/megix.pdfIn PDF document text
    • http://poslovniimenik.net/firme_data/files/69938789758.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607698c318a00---57138465649.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3711bfb1c---segipemabusu.pdfIn PDF document text
    • http://korytnica.net/data/files/79395026609.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/4067590163.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609e55bc95308---32172467845.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb6dfd701f---39328892205.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/9d8f30748ed3785056014b82109c3dae/livip.pdfIn PDF document text
    • https://datatech-int.com/userfiles/file/zivaxikijawalero.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/eb96a3e2eab34035bbcc02fda883992a/rebijujavofilol.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861f3580685---81401615687.pdfIn PDF document text
    • http://imaginove.eu/data/Files/56053084387.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdc0fc9f51---losufunafetulilavukizigi.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609314cc110ab---44367935471.pdfIn PDF document text
    • http://omatsuri.kr/data/userfiles/files/saxilodufudibunuzeke.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/6db8e27c25db105eb455df5a5e9d17f1/92492064489.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=the+doors+greatest+hits+songsPDF 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_off0000f7ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11001 10444 bytes
SHA-256: 79c17b806a30cab1d1c29014b033d139b37cd808f8003f3a9e1eeebb968021ac
font_02_sfnt_off00012770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12770 17744 bytes
SHA-256: 0ba85d189075f2993ba03fe2a25225cf6b2e8c8aac34c23e3d4e081207396503