Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2d442e1b8438998…

MALICIOUS

PDF

86.7 KB Created: 2021-07-30 16:26:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: df1eb4c7cbd5600afc1e41575a8eb0c7 SHA-1: b5c728d89df1cf6ae0988a7e4c6e324623199ce4 SHA-256: c2d442e1b8438998e2f6bfedb5c0328d23b79dcaead1d5df11c2faf8c236fe3a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely intended to lead users to phishing sites or download further malware. The presence of embedded URLs and the nature of the heuristic firings strongly suggest a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://lateonsettay-sachs.org/userfiles/file/69618607140.pdf In PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/58f8dff268d07026e1e50b7217614f42/faguzarilojifosodi.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/9b574a941bdc702d8ac0bfb2f3596e10/14661807210.pdfIn PDF document text
    • http://gamax-motor.cz/data/dokumenty/lusonasobitesilasolare.pdfIn PDF document text
    • http://dongfangguohua.com/ckfinder/userfiles/files/589416985.pdfIn PDF document text
    • http://tlproduct.com/userfiles/file/57413837632.pdfIn PDF document text
    • https://chptravel.ir/data/file/mefazemule.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/6326a09a573978c08cded5f504a81de3/36339496697.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9c2fe39ae---13945466655.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606e819e8dd7b---mujuvurufaxozawepusuj.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/72948348645.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/85696524998.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609bdba5acf15---20300932554.pdfIn PDF document text
    • https://vibangnhadat.com/uploads/files/87611841507.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/badewebajobuwafaxesuse.pdfIn PDF document text
    • https://terminarz.online/kosmetyczka/krakow/files/54458401529.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/lubudokadifavo.pdfIn PDF document text
    • http://unseretochter.com/images/file/5548593039.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16081c1cbb8ddf---zopokesusotegonir.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/d5ba779375b46bebfa14d333658f3022/69278728571.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/4f33601d313b657bf3e9c1182637fcb5/vaguz.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/dac25f8d270b0c9c8466d509e8d1a5d8/tavofupobezomuvi.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/11479c2a7152849614a31295dcda3a40/limiradujojirurub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=can+humans+get+camallanus+wormsPDF 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_off0000ef8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000107a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A1 17132 bytes
SHA-256: 4425b0257cfc65a25fc1e6f35a86ca3e22d6687855011ad46e09d240f32bf7a6
font_02_sfnt_off0001341a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1341A 10800 bytes
SHA-256: 2ad4b8f8f404aac73d5392f3435a22e51cc81e576c19cef043845a86eaae13f7

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