Malicious PDF — malware analysis report

Static analysis result for SHA-256 7194c0d98274c22d…

MALICIOUS

PDF

88.2 KB Created: 2021-07-10 10:34:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 21420823ccc53db42c421e8bf8144617 SHA-1: 7e87edc676bb4ac174f31a80d5275b08b5e4f71c SHA-256: 7194c0d98274c22ddcc3db3f4cbad7092a4232c96759574b596fe63fea22adc0
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The presence of these link farms suggests an attempt to lure users to malicious content or phishing pages.

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 http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc63432d9d1---bonulubikakavi.pdf
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/d2c540a2fd060c2b7d04364e27c11ca1/kodatin.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aece72caa9---zivulopizifelagotanex.pdf
    • http://agiusfuneraldirectors.com/files/file/vupodejujowamakegusit.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607caa1877c7b---nexunabexot.pdf
    • http://ridendo.cz/files/file/xedunoxipew.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a4551de6ee7---72741955178.pdf
    • https://prosperitas.be/data/assets/file/7568011047.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607d06440eb42---fexuvasa.pdf
    • http://kaushalacademy.org/ckfinder/userfiles/files/gapirologulukumadoru.pdf
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/3d0d91a7284d28d4240a005cb0455ffe/dakidejagivegefeb.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/0bd39c97d02cd67ec900f28956929019/zipepobepibaw.pdf
    • https://discovercefalu.it/_data/images/file/gopitunurarit.pdf
    • https://naoshima-habitant.com/suwawoke.pdf
    • http://phantasos.org/userfiles/file/xipeloruzawaxosub.pdf
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/hd6bk5oq8qsit0ojgbrdcin51u/19863785258.pdf
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/0d9727d5410225bf9269aee6b7d2cf9e/22077545741.pdf
    • http://metaglas.kr/userData/board/file/15946517038.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b59b34d6c---sofimuwi.pdf
    • http://newbusan.net/FileData/ckfinder/files/20210702_7D67DC7794E2E679.pdf
    • https://aptitudeclass.com/ckfinder/userfiles/files/zosiketotexebaf.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c72895a07a---6490443575.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160bc59311aa12---julifipebosodevanixeda.pdf
    • http://www.buildonhope.org/file/nerixemoporiwibije.pdf
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074602d7e6ca---vadofavubevonukote.pdf
    • http://thetuckerfamilyreunion.com/clients/67950/File/xovukebevedenigibure.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/4565e41ca1f18b86da056f09c7711aeb/returu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=avalon+water+dispenser+troubleshooting
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f40b.bin
772fe726705b7fcef1f043d7381e796f3711d5664b905c72b8dadce525034c65
pdf-font-stream PDF embedded font (sfnt) at offset 0xF40B 11044 bytes
font_01_sfnt_off00010d55.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D55 16792 bytes
font_02_sfnt_off00012567.bin
ee27669f390266b73f34ba34eb7c53c45a6c5df8dcb117ff12312a2415e82723
pdf-font-stream PDF embedded font (sfnt) at offset 0x12567 17220 bytes