Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc3b8d0989ca7f12…

MALICIOUS

PDF

91.5 KB Created: 2021-08-12 21:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 81e06c8f7ab25f1247cd6fab14defce0 SHA-1: d1db759688e7887b19973294248dc6c2024858b9 SHA-256: cc3b8d0989ca7f1252b539e8ddac35bbd710bd0ab9ccefe737b69a882c926033
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that form a link farm, with many pointing to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/7fc4216e311bf9eadb2566a8ce2914b9/zifonase.pdf In PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a98f360e32---64984094960.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609790cec0a98---62069960776.pdfIn PDF document text
    • http://thetestmag.com/userfiles/files/pekukivifiwo.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/683a393e2f0af4c371334242b4d93411/28061424036.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/701141e12c11ed1a0d58d17fcb783917/dejoxogas.pdfIn PDF document text
    • http://emanuelarombiarchitetto.eu/userfiles/files/52313160200.pdfIn PDF document text
    • https://stdtekstil.com/upload/ckfinder/files/35296514941.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db639d43a4b---xamumetiripajodun.pdfIn PDF document text
    • http://okwmd.com/upload/fckeditor/file/wodenufatopovuxekuz.pdfIn PDF document text
    • http://hobbstownis100.com/clients/6/66/66141d04a4341350d76ae3a38785cb5a/File/78452889112.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/f8e4584cd8e16f75c6f64dce9cb1cb13/37052830313.pdfIn PDF document text
    • http://hosungtour.com/FileData/ckfinder/files/20210712_14D9542970B8DC39.pdfIn PDF document text
    • http://1959blackshirts.com/clients/866684/File/86176316994.pdfIn PDF document text
    • https://global-brand.net/userfiles/files/fenuvefudi.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbc6aeed34---gabazefogomosaxiga.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160731927257fc---libezumarelodu.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/ccrdq71220p9lov9k57ko5gup2/kuwigag.pdfIn PDF document text
    • http://usarsenal.it/userfiles/files/42573077246.pdfIn PDF document text
    • http://newabel.com/ckfinder/userfiles/files/jadub.pdfIn PDF document text
    • http://hk-dcc.com/wp-content/plugins/super-forms/uploads/php/files/nbp5as76tu424tkjbrg1qljkmj/78682508509.pdfIn PDF document text
    • http://newgrids.com/userfiles/file/44791223442.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/1hunq53nlelpkd7uvu2ln59sg7/22490133005.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/4405876475.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=wavlink+wifi+extender+not+connectingPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF651 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5E 2368 bytes
SHA-256: 75a0bef47c8c3a087425dfd950786fe54ced82ebab475122c58666834f59500a
font_02_sfnt_off000118d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D4 17304 bytes
SHA-256: 8a5450c0820b4348d3c0bdd5e67887facca2457d9f16eb2ef6a3ec86575568ed
font_03_sfnt_off000145f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145F2 10820 bytes
SHA-256: 3155395d9f336cda344b7b10dff607daf7ebc049581eeb2f87bc4d5aa6ef20ed

Open this report in the interactive analyzer, or submit your own file for analysis.