Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1620e7a7f54e5f3…

MALICIOUS

PDF

86.9 KB Created: 2021-07-02 06:50:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 7346b85f74fcde2bb284226c9ab22a78 SHA-1: 2a9ece8815d3314dd8da3c61422815c10901bbd2 SHA-256: d1620e7a7f54e5f31fa44bc2af5ac685850b2f5fa44c051415388bbf029578bb
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to websites hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or trojan payload is intended. No scripts were extracted, but the structure and URL analysis point to a malicious intent to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://almondzwealth.com/administrator/imagetemp/file/15261550152.pdf In PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/a709bbbef3167b7e891274a9d187751e/77262180925.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/7e9b6da2ae5c5c6f1d513f961feadbc7/jejejov.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/h5ul50c7otttrik47c3mqcaj64/36365292832.pdfIn PDF document text
    • http://sutphinsgermanshepherds.com/clients/21958/File/doxalon.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/gibajelexelar.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/cd5962d60f9378d1f93f227050beb6ba/bifavokexotolopile.pdfIn PDF document text
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/648ca0615def82a2ba8e2d0b8225b528/woniladugatedenupavibamu.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c5a2b9c2541---87920748380.pdfIn PDF document text
    • http://coffee33.ru/archive/file/75650910116.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4562d804b---sajoduli.pdfIn PDF document text
    • https://vibangthuaphatlai.net/uploads/files/61783808750.pdfIn PDF document text
    • http://thetestmag.com/userfiles/files/98803920057.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/j5tdb8nqd5jssfjqgrgtlriapv/zizisawerowagoxax.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/nunaxifolatasoludutuwiba.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/valorozonijo.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/16085ff9ae74fe---xetiwep.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/f1ff5785945209de3d2b328beacea221/sibotugikevozuj.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/f56527bed377e31d3231b69fa192db7e/66195317727.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/9e3e25627e9ae1164abbe6d5559cd4db/35353730896.pdfIn PDF document text
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/0918f7be5e51e49167cc7a0fbed9ff61/71292920415.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcbbee5d70---20646479337.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/ssk4k3aol0hh5jc97ffsfvbeq4/bigarobijosarikikerigepo.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/57deed0b61f9e62d77e39eac336f1071/fibejirukajoropijitevete.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/gofozol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=in+the+world+not+of+the+world+versePDF 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_off0000f2e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E7 17088 bytes
SHA-256: a5c179ad1b00d436c0c8a3df3918282152aa997b5af9856256a17145cfea5939
font_01_sfnt_off00011f12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13729 10300 bytes
SHA-256: 8ef276cd0e2490fbba9766ade06170018756bf510369e67b4c2d282922c3bbf9

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