Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fafc929ed859ff8…

MALICIOUS

PDF

81.7 KB Created: 2021-09-24 01:53:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 069e3c33396d1000bb09d971b67cd18e SHA-1: db747ddefb6324632ed3ab941d70e96d531d6bf2 SHA-256: 9fafc929ed859ff838e4bce271da18deb9b0a7c216f6640bd2542ec06604b703
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131aede576e3---diferilewelakuxon.pdf In PDF document text
    • http://tkhomedeco.com/assets/uploads/ckedit/files/20210919124327.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613ca02c00037---53021643042.pdfIn PDF document text
    • http://sirinthepgroup.com/userfiles/file/tenifo.pdfIn PDF document text
    • http://www.radio-kum.si/data/files/suxipikakujigepafukut.pdfIn PDF document text
    • http://sancheonglittletheaters.com/upload/userfiles/2021/09/files/210910173718.pdfIn PDF document text
    • http://lulanjina.net/upload/files/nopefovafitufi.pdfIn PDF document text
    • http://radio6deenero.com/uploaded/files/dedip.pdfIn PDF document text
    • http://ppfi-online.com/userfiles/file/1779256619.pdfIn PDF document text
    • https://cupanghitam.com/contents/files/nozufawe.pdfIn PDF document text
    • http://ibnuaffan.com/ckfinder/userfiles/files/kovogidixavevilenox.pdfIn PDF document text
    • http://jewelry-shopping-city.com/uploads/files/202109091252021038.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/2d049c5e4e244c260c58845f87513418/88320356736.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/256b73db34d508bfd6ccc7d033956c00/99400818420.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16140ef76d1b53---76395374627.pdfIn PDF document text
    • https://value.ae/userfiles/file/tikudokerabulososisut.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/79310881228.pdfIn PDF document text
    • http://ranahytta.com/ckfinder/userfiles/files/zerokoxu.pdfIn PDF document text
    • http://www.badischer-kunstverein.de/ckfinder/userfiles/files/jijetug.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021090210491173499.pdfIn PDF document text
    • https://omnistopbollards.com/application/third_party/ckfinder/userfiles/files/lekefowezopazolifazaper.pdfIn PDF document text
    • http://precisao.org/files/files/tolinugofasubenanasavo.pdfIn PDF document text
    • http://eapver.com/upload/ckimg/files/202109121433002892.pdfIn PDF document text
    • http://fotografoenricogiampieri.it/userfiles/files/70237567301.pdfIn PDF document text
    • https://elmawadah.com/userfiles/file/kupivogojepikipizofo.pdfIn PDF document text
    • http://eltprof.ru/userfiles/file/botuwaserizikowi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=game+pass+chromecastPDF 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_off0000d968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD968 10436 bytes
SHA-256: 5be61361d4c719b534b2b7057fb9248342bcc654ac967109bf387af63ce01851
font_01_sfnt_off0000f11e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11E 18344 bytes
SHA-256: 7cc438a1abbc10183057e6fcb460c15250f3eb8751a17769bbb818eb64a9db19
font_02_sfnt_off00012127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12127 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1