Malicious PDF — malware analysis report

Static analysis result for SHA-256 b69c8f1e87cb0e79…

MALICIOUS

PDF

86.7 KB Created: 2021-07-20 21:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: d23a53f8f645209402aad01da2325d07 SHA-1: ff4ad1bf03f808e4eefe674c01b39acca67353b3 SHA-256: b69c8f1e87cb0e796e69800998600872823375a62ca849fa77c6b42fee2d7b4e
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. ClamAV and ML classifiers strongly indicate maliciousness, classifying it as a phishing trojan. The embedded URLs are the primary indicators of compromise, suggesting a redirection to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/bee9cc3b8b677b4f10a6b0947ad4c6eb/liruzorawigobez.pdf In PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/54396908484.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/88207161888.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076e8b1af02b---kokipus.pdfIn PDF document text
    • http://abworder.com/uploads/files/kewapadalenunolovararudat.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606f2a908fac1---29959077208.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/9631d4f88b1e10d8dafe29d4ada367e7/91246629825.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6c98773b3f---56326261171.pdfIn PDF document text
    • https://smartcrm.cloud/upload/files/70114934396.pdfIn PDF document text
    • http://kururlaub-ungarn.de/bilder/files/vekajebosinelobuxas.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/52647089353.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/66c1jgoa4cbsgp1n461hd0htp8/74935687010.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096ba00e57ce---23843668804.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c848acd080---78921426165.pdfIn PDF document text
    • http://vuatoyen.com/uploads/userfiles/file/firobinefoseraz.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7553bb53c3---62483839221.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/heki8oqsnnu54ge10itj7tn61d/gigoxulutuda.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1608d609f767d3---56044732185.pdfIn PDF document text
    • http://trungnguyenjsc.vn/uploads/image/files/sitowasodaroxepozonibiv.pdfIn PDF document text
    • https://solener.info/ckfinder/userfiles/files/83732894390.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/p6eopvspvfqqjn4ipmh6gapvol/91104683677.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/6f12432817cb28001e782474e6adbefa/zelareloronojekifigebifif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=exercises+for+swollen+anklesPDF 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_off0000f258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF258 16628 bytes
SHA-256: 0a2b9184b43963fda6478abd36ca22082ca83a1093480279e6971a41e2bf02db
font_01_sfnt_off00011d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D96 10496 bytes
SHA-256: 783e1ad3d6744df1ac7028b12ffbb705f67fa727e49e8e07bbf6563a41a554f8
font_02_sfnt_off000135a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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