Malicious PDF — malware analysis report

Static analysis result for SHA-256 69072bbb212c1f70…

MALICIOUS

PDF

78.3 KB Created: 2021-06-06 10:08:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 002c97f0134ac8d72c29200da8b6e2fb SHA-1: db0cf181c2d2ae009873425885c19219bcb7e5d6 SHA-256: 69072bbb212c1f70371d168453475a47a2706b7e90ffbea9b4f77acc7de2c464
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or phishing pages. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to distribute malware or facilitate phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://drafthe.ru/uplcv?utm_term=how+to+get+point+slope+form+into+slope+intercept+form PDF link annotation
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/52on6n2i2u34vtihg49mmhdaii/taganulefajanasogela.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210523121223_1033296226.pdfIn PDF document text
    • https://perfecthospital.org/FCKeditor/file/42846339728.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/94732123439.pdfIn PDF document text
    • http://perfekttorun.pl/pliki/52187272556.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a42d665f3de---37150628284.pdfIn PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/mozitidijizikutafolelamaz.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/46720440534.pdfIn PDF document text
    • http://abc-tel.ru/data/File/38912046399.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/602483c2643bb282e0bb16aaadee042e/pawirenakagejegof.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/n4kjmuojaa9q258vkotab1m73c/darutijile.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/49c2a9ceb22fce0c6508b0195cacf094/maluvojid.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1056ea918---funadarirowe.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/2f826a6088157487c6c7fd212a37949a/febafulodafozawuwakutiwux.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/7f1eed36a294cff055cddf78d4178982/26312166596.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dda7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA7 3048 bytes
SHA-256: 52f6b4b883c8e228b8fbcba37c1708f292ccfbf431a59437ba06a82438b6fe11
font_01_sfnt_off0000e892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE892 5176 bytes
SHA-256: f46b979629f2137602ff3f5e022f8c06b88a40ed4dfe4de34bd3bd33fe387827
font_02_sfnt_off0000fa36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA36 3732 bytes
SHA-256: fd0bbab5e6a841bb509bc8aefd07917c4092f1358dd581694dc7ffa060827f73
font_03_sfnt_off0001043f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043F 11440 bytes
SHA-256: 1c79686d760697d263e3d565fb12ce77757edfdd42db7221b3ddd7fa2563ad1c