Malicious PDF — malware analysis report

Static analysis result for SHA-256 2da191d9c00ab424…

MALICIOUS

PDF

77.5 KB Created: 2021-07-20 17:01:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: c510d5d855a3c79df907d982e0592826 SHA-1: 0496c2a8127e984352232fba4001c3a736195ff8 SHA-256: 2da191d9c00ab42469d1155ea8bf93e09e912849ab3be259fc4629ace6a30029
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a malicious link farm designed to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/j6q98qefe06f6n0e5hnd6n44u3/kikatoxofam.pdf In PDF document text
    • http://backupcenters.com/userfiles/file/gifaziwavivatitepavipoxu.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/8143ee604389b06db8200a0f68724594/vufewopozod.pdfIn PDF document text
    • http://mashtalkandil.com/userfiles/file/99801457201.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e8d1f8e2150---99344285091.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd51a7ba0b---wotowitazu.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/1043582720.pdfIn PDF document text
    • http://farashimirooz.com/files/65424803011.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8e51487b9---80375924465.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210706184853.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/86406069308.pdfIn PDF document text
    • http://schokoladenfontaene.de/idata/vitoririloguzotubafelugox.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/tozafumowazokexosekefu.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/tokorobufozulinujotom.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a44f6f9f80d---sipazexamitadapupezikamo.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d058356dac---gegudagesadukav.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609834e45edfb---zimobamulidudigivinet.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/c2hjm7l96guas8ovvg2j7foc57/lekedili.pdfIn PDF document text
    • http://d4storonto.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/gifuduzovir.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/lobimuro.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/95ed556303da0807040d55d6a623270b/kopaza.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/16171923122.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/6f99031282d93a65676a136df3578f04/68693424378.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/dapopafokiseranokumoson.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=the+magic+numbers+take+a+chancePDF 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_off0000cc96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC96 17532 bytes
SHA-256: 50ce42676bc8c73d1959cd42540e1b0ef2cf897693b488c8582c797fb7f922b7
font_01_sfnt_off0000f81b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81B 10804 bytes
SHA-256: ae7a00df5ec8f962066c4fce0303585839fe1eee62685a7a71d27723633b2635
font_02_sfnt_off000110d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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