Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bbaab06c02682ee…

MALICIOUS

PDF

78.1 KB Created: 2021-09-06 16:38:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: f69a75b2238a646344cdf1020da39910 SHA-1: 6fbab6316982605035956e685b42aab67c1ae169 SHA-256: 1bbaab06c02682ee86fad578c690361526e86f40d616887807908f18c4b71043
156 Risk Score

Malware Insights

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

The PDF contains a link farm heuristic, indicating it directs users to multiple external websites. Several of these links point to compromised CMS upload storage, suggesting a potential distribution point for malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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 http://atthaya.com/file_media/file_image/file/segisizezatoparozunuv.pdf In PDF document text
    • https://www.khaosanpools.org/ckfinder/userfiles/files/kizamir.pdfIn PDF document text
    • https://biovuspharma.net/userfiles/files/joxenaf.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/48638824725.pdfIn PDF document text
    • https://bio-obst-und-gemuese.de/userfiles/file/fijebenanamelaxom.pdfIn PDF document text
    • https://drbumbnursinghome.in/ckfinder/userfiles/files/koposefuzajopedodanoba.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/ceea79d914338a0d005a74c6bdaf9120/3634723134.pdfIn PDF document text
    • http://showpalmedical.com/userfiles/kofurimibulezaz.pdfIn PDF document text
    • https://g55net.com/webpagebuilder/ckfinder/userfiles/files/zegasazadovakigoku.pdfIn PDF document text
    • https://everywheregenes.com/uploadfile/qu26_qu106_com/files/lajewogusavipudafasim.pdfIn PDF document text
    • https://mailing.crpm.ch/ck/ckfinder/userfiles/files/86055197645.pdfIn PDF document text
    • http://pngroup.pl/ckfinder/userfiles/files/fosopeje.pdfIn PDF document text
    • https://bouwservicewinthagen.nl/userfiles/image/file/zisonobasojudanewomugu.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//norofifulaputupu.pdfIn PDF document text
    • http://sromedical.com/file_media/file_image/file/44532144968.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/iahjk013q04hg0q2k9e9ni8br2/50149896751.pdfIn PDF document text
    • http://veivel.com/userfiles/file/rezupolisejoxud.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/b24bd380ebac67f6ce15a094805726dc/67577769968.pdfIn PDF document text
    • http://kyea.org/imageuploads/xodixipo.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/rijikenetu.pdfIn PDF document text
    • http://agenziadiviaggiocagliari.it/file/18312980408.pdfIn PDF document text
    • http://dent-pro.cz/pic/file/22161917863.pdfIn PDF document text
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/k8shfu5mth8c8882a038imfq20/45257668069.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=oraciones+subordinadas+adjetivas+y+sustantivas+ejercicios+pdfPDF 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_off0000c721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC721 19152 bytes
SHA-256: 6cd26f650d903532e7d35a3d70a30cf1bff3f116c836e6a42eab4a4d8491841b
font_01_sfnt_off0000f886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF886 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001109d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1109D 11144 bytes
SHA-256: eb6003c3ea7cda251066515e93f4747b52ee7719acded9e292f2334bb9ecddf8

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