Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ebec97b5ff73b77…

MALICIOUS

PDF

79.5 KB Created: 2021-09-09 01:07:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 6156fbf633d9558f296a86ebaf710ac5 SHA-1: cc0abe2d67bbfc15f5983028f226cc007d5b2c84 SHA-256: 7ebec97b5ff73b77eca83f5a67b8f2ef8be95e8c3dd8cbcdb1130f436a938323
184 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://mamotato.ro/userfiles/file/69181998738.pdf In PDF document text
    • https://5udua.com/contents/files/81215308918.pdfIn PDF document text
    • http://stluciachamber.org/uploadedImages/contentImg/file/javuvebepivusolowisan.pdfIn PDF document text
    • http://emke.hu/uploads/ckfinder/userfiles/files/30195272829.pdfIn PDF document text
    • http://185.33.116.142/~bbyacht01/upload/files/pezava.pdfPDF link annotation
    • http://hasdeu.md/data/userfiles/files/jifobepofu.pdfIn PDF document text
    • https://phuquiland.com/upload/files/sanarukam.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/bcvvhebodsg6u9075ml8kcvff1/wudulegajulumirujafutinew.pdfIn PDF document text
    • http://tnslib.tools/userfiles/files/xojononodilatavugali.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613033d72905a---52710373591.pdfIn PDF document text
    • https://aslplastic.com/ckfinder/userfiles/files/65649206666.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/gogavuzogog.pdfIn PDF document text
    • https://full-flavors.com/img/Data/file/61170020921.pdfIn PDF document text
    • http://www.jasfec.com/imgs/uploads/basavubobawiwerowosanipeg.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee3222c881---36863880218.pdfIn PDF document text
    • https://ginecologmuresan.ro/ckfinder/userfiles/files/limokowawufonevivi.pdfIn PDF document text
    • http://dharmapuridiocese.com/svnprojects/DHD/Source/images/files/vulosotas.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/36612302353.pdfIn PDF document text
    • https://soswzgierz.pl/web/uploads/files/59741878731.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/re10him2okep8lnoru6u7peds5/77383714428.pdfIn PDF document text
    • http://krajinar.cz/soubory/files/98324901129.pdfIn PDF document text
    • http://millecolori.it/images/file/79544172912.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=swift+streamz+iptvPDF 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_off0000d43c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD43C 17000 bytes
SHA-256: 1374a20febbb3048341a4cb8a1774d7e72413ae7df6cc694b1a84488a434dc62
font_01_sfnt_off0001001f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11836 10536 bytes
SHA-256: 96e9cd5a43257eaf355fe959dc285dea2e7e1332f504f4e4266c88fab9f73825

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