Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1327ba498510c2a…

MALICIOUS

PDF

160.3 KB Created: 2021-07-10 07:35:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 9be43a7ec4781131ae6832aa086aa0e4 SHA-1: 788c927d67330292bed710136549bc2549c900a4 SHA-256: e1327ba498510c2a42ac34abe7d280b2c699ad031528ce159949784ac612b87b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It functions as a link farm, containing numerous URLs pointing to compromised websites, many of which are hosted on disposable domains or use UTM parameters for tracking. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9334

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://catamma.ru/uplcv?utm_term=hadith+about+masjid PDF link annotation
    • http://adance0112.com/upfile/editor/file/42379988807.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b829c96d713---10440464085.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cbeee5ee8c---zoxelojezaza.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/22184324161e1b98d9075e0db5d508e7/49425273201.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/5a74d1dd965bbcc542125649a5487a99/17339845794.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/saxikabolodumidudep.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/16078378930b78---kuwagil.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/3pfftdigsq5rpe2cubr6tekqr1/17953323296.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607035a011dcd---26242243619.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/nd3v2gvfu73jgua7hugmrdatvd/76599947625.pdfIn PDF document text
    • http://1night2daytour.com/ckupload/files/regavorileliwevoma.pdfIn PDF document text
    • http://global-insurance-broker.de/downloads/rototuxepejigagobiwid.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609409459a3a4---fojexevodiwazisipexomizo.pdfIn PDF document text
    • http://fanti-fitness.pl/uploads/assets/file/buratebejasasizesukorozim.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa2fa7a2106---12057299842.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/oj857r593rhbcv2hadjecnb3ms/16918608594.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a80e90c5db1---xitepuzi.pdfIn PDF document text
    • http://10glazsikeyrosa.ru/file/51812681809.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/0ac8946c5fea2fa7bc7d06804b125eab/wapisikuvijumogezisutaz.pdfIn PDF document text
    • http://hiredriver.com/uploads/assets/files/41111353744.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/123df80b66e9f8f7acc86f5dbc0c80df/mazekorogogesapetujuniw.pdfIn PDF document text
    • http://sicilyontable.it/userfiles/files/51837717289.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3c247b152c---roturakirodiwezis.pdfIn PDF document text
    • http://silverleafspa.ca/clients/10619/File/54427349496.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/ab1d68be97d91e7aab548a88e3ede134/50198200744.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/87602955642.pdfIn PDF document text
    • http://secretinvitation.net/images/files/62132519183.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0001ea88.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1EA88 18892 bytes
SHA-256: 3e107148376afa4d9fdc31843be673a768f8d3907d8e38976ae1b7f03f5436f2
font_01_sfnt_off0002086f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2086F 24764 bytes
SHA-256: fdafa74a4094fdaace757eb3cb1ff9d4d9b78e40b6c485a11eb97a710e32d4e2
font_02_sfnt_off0002444a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2444A 10492 bytes
SHA-256: 7d41129dc2a35b7bbc32e33a165e829cd45bd1d827d591e8e8d6a19536c93ba8
font_03_sfnt_off00025c06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25C06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1