Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e70602c14aa4b2…

MALICIOUS

PDF

85.2 KB Created: 2021-06-24 20:02:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2cf4dfcca894f03cd57f2e6905f1d241 SHA-1: cd7e6df3f0c4e4ba90d4ffe926c0b18707da4aac SHA-256: 80e70602c14aa4b29c2fd9d20f4b7fb7b39ae84f8f772bc30ae769a4dd1de7a8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were directly extracted, the nature of the embedded URLs and the 'link farm' heuristics indicate a likely attempt to host phishing pages or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c21c881636---76852195003.pdf In PDF document text
    • http://phayaotechno.com/UserFiles/File/20374791481.pdfIn PDF document text
    • http://saxonsaxtonfamilyreunion.com/clients/f/f6/f6d0431f970e0833b0867c311dafb132/File/zolabanevemovukejoluriwa.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/75d6984dc75d7ba8fd465fecb8b18c0f/8967349815.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/2101965486.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/aq07uha70gl0jpbsbggh106u7l/zofonubobele.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/d107cbf1892d341da2c9c04a843afdeb/ponuzeteraf.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609634094b72a---29475008328.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc4ec01d0e---260706277.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f929b7c2d---28987180232.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608878ccd7816---gagagetisi.pdfIn PDF document text
    • http://janandpoos.com/clients/872640/File/bugefilotexede.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/27541532590.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/wizutabosof.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ac021771f31---65794445564.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=nato+phonetic+alphabet+espa%25C3%25B1olPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC69 5036 bytes
SHA-256: 745d48957fd08d8c598dfcd83a81628d21234a4fb7a71ffa5c451691ee0a9f36
font_01_sfnt_off00010d2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2F 12648 bytes
SHA-256: d2cfdf5a89f89a5ee21b2dc386297e2f20f968140db28127012157456f964829
font_02_sfnt_off0001376e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1376E 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c