Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e946e77fe030cb2…

MALICIOUS

PDF

73.1 KB Created: 2021-09-24 13:35:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 315ac806b31d2d0953de314ae0e64e24 SHA-1: eb629187d4ecda8cfd1f6c2dcf60747b88a2a38b SHA-256: 9e946e77fe030cb2866d6f6e6729f830a3076b52d4abc247ba3bab9a3662d9c1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to redirect users. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and a high ML classifier score strongly indicate malicious intent. The file's structure and link farm behavior are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9915

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://pixomot.ru/uplcv?utm_term=download+android+sdk+for+windows PDF link annotation
    • http://m-s-g.ru/userfiles/files/8225450972.pdfIn PDF document text
    • http://myappartement.de/web/editor/files/63868482234.pdfIn PDF document text
    • http://vetusmeter.com/images/upload/File/15061099031.pdfIn PDF document text
    • http://sperrincaravans.com/images/file/riburidomebuv.pdfIn PDF document text
    • http://sakra.sk/storage/file/vikirorikiwerubuk.pdfIn PDF document text
    • http://bronia.org/userfiles/file/88168798193.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/161475f7601122---zuvokijawe.pdfIn PDF document text
    • http://logenamerica.com/userfiles/file/wajobitiviponovutemiko.pdfIn PDF document text
    • https://full-e.com/app/webroot/userfiles/files/20210918_221810.pdfIn PDF document text
    • https://eownauto.com/uploadpic/files/puvesixopedukekaluke.pdfIn PDF document text
    • http://nedvizhimost-v-sharm-el-sheikhe.ru/uploads/files/ginafofekopibelatutuliket.pdfIn PDF document text
    • https://swagath.co/new/ckfinder/userfiles/files/78703710174.pdfIn PDF document text
    • http://xn--hh0b97d8is16e.com/userData/board/file/20924439420.pdfIn PDF document text
    • http://ltmetal.com/userfiles/files/jemigir.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/8a2840e454de24adab4255fc301e61f4/46930638781.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/85040749815.pdfIn PDF document text
    • http://textstricker.de/benutzerdateien/doterirom.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140fe95f25d3---1163721260.pdfIn PDF document text
    • http://faptvmedia.com/userfiles/file/sanegevutosemu.pdfIn PDF document text
    • https://nepalmicrofinancesummit.org/userfiles/files/39806559189.pdfIn PDF document text
    • http://xn----otbbfbbknchz.xn--p1ai/sadm_files/55094784266.pdfIn PDF document text
    • http://chickendaylacrescenta.com/uploads/files/folodosedasiwafenarevede.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/43662670669.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/20766124562.pdfIn PDF document text
    • http://ediljolli.com/userfiles/files/nedejorebizodawutilub.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/sakenoratixos.pdfIn 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://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_off0000b936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB936 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD148 17868 bytes
SHA-256: 2bf8b5b5f7aefcdfaec4094f764a872a29138b3e39beaa220c250592de5359f3
font_02_sfnt_off0000ff4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF4A 10296 bytes
SHA-256: d39f225f55da9bd2bf20a76c271ff9a5e45e6261316544ea9a63a7d5fdc2d8f2