Malicious PDF — malware analysis report

Static analysis result for SHA-256 cee45f76385003a6…

MALICIOUS

PDF

82.9 KB Created: 2021-09-01 06:00:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 89a3221f2ed2d166e00526487f73a800 SHA-1: 5ecb695ff76e1dcd47c3bdbe0dcb48dada679d2e SHA-256: cee45f76385003a6af97aef908b629ec511ff7d22235745b125c6514e60ad009
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection. It functions as a link farm, directing users to numerous external URLs hosted on compromised or disposable domains. The primary goal appears to be directing users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://philabc.ru/uplcv?utm_term=spb+tamil+hits+mp3+songs+free+download PDF link annotation
    • https://invest.pl/userfiles/file/60099409254.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/rga12t9qsje6h7sv6dfiu1nkl1/80756810082.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/e841bd03ce3788b87c7b03213ef9b96c/4714720273.pdfIn PDF document text
    • https://argumentua.com/i/file/27794148113.pdfIn PDF document text
    • https://0924055971.com/uploads/files/202108230852582358.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/69032592191.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/vabulelisezodanagutanona.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/l0d7ap815tu079ju4odhqp1q22/fupudokagoboma.pdfIn PDF document text
    • http://www.elstar.ru/uploads/files/nereloraxidazosod.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ac8a5d7b6---vokodazuropefepazi.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608245de2a460---bukigigojaxeduloko.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/48272903905.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/1267464f9d386a287a074ed76f57776c/38237244902.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091fb2b45668---95273922837.pdfIn PDF document text
    • https://hunde-katzen.at/soubory/teremobakejotot.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160829f109b95f---61364174509.pdfIn PDF document text
    • http://bizbecho.com/pa/trainstation/uploads/image/file/foporaxes.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/wazuninajefafav.pdfIn PDF document text
    • https://ienter.bg/files/taxisajogutit.pdfIn PDF document text
    • http://rulife.ru/ckfinder/userfiles/files/39507282153.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160fdcf163c332---12562064633.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c71c2e5020---latepimipozugunesumu.pdfIn PDF document text
    • https://mintowncoffee.net/uploads/images/files/vuwajapidimivum.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC900 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE117 11416 bytes
SHA-256: 8534a78b0bc6ad6eb792f88b10ebd834ce8a5fd7cc199d883915a7fa4f441475
font_02_sfnt_off0000fb72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB72 16228 bytes
SHA-256: 6de2e4de3e01fd5ed443d1209e1dacf3a9d2e38faa1ffa722a59a0423b67245f
font_03_sfnt_off00011148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11148 17076 bytes
SHA-256: 10a2427e8d7f889228cd4612dc3f93a315a9c0019db591ae656225637c76de90

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