Malicious PDF — malware analysis report

Static analysis result for SHA-256 7049ffa2ab7f8fe7…

MALICIOUS

PDF

80.7 KB Created: 2021-09-23 08:42:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 2744bae517d686ab56dbae4c1899b5cc SHA-1: 9885d60988bfe3581579f966c1e13e98b109a8cc SHA-256: 7049ffa2ab7f8fe7c274d1a8e358497b91acda99435dfce310a89602bb13b416
156 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to compromised WordPress upload storage and other disposable hosting sites. This suggests the PDF is likely a lure for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://tysons-cafe.com/uploads/files/kizidokiwipurasepemuma.pdf In PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16148ef9982ccc---jexesexowoxofaz.pdfIn PDF document text
    • http://faw-asia.com/image/upload/files/53110554102.pdfIn PDF document text
    • http://25630638.kad.tw/kads/ckfinder/userfiles/files/jokabaguvajexed.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/22521832398.pdfIn PDF document text
    • http://eca.or.th/ckfinder/userfiles/files/gasibiko.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/sko1rqbkkjsfdv3q6k0os1uepk/41371278759.pdfIn PDF document text
    • https://get-insurance.in/ckfinder/userfiles/files/96695616189.pdfIn PDF document text
    • http://pinxedien.net/upload/files/27011161609.pdfIn PDF document text
    • https://skywaytravelandholidays.com/ckfinder/userfiles/files/lanizemabubavonemoza.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161335f4b1f4d3---falewowogonebunoxa.pdfIn PDF document text
    • http://ffarchitettura.it/userfiles/files/tojazuxadekijimok.pdfIn PDF document text
    • http://gdlianyu.com/uploadfiles/file/94808178487.pdfIn PDF document text
    • http://www.sunriseacademy.in/ckfinder/userfiles/files/sosuluzuvipogu.pdfIn PDF document text
    • http://shepardinteriordesign.com/rw/upload/file/29851116218.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/fubowiwuzarivig.pdfIn PDF document text
    • http://rts-3.ru/upload/files/51236416649.pdfIn PDF document text
    • http://phyllisrubensteinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wiwox.pdfIn PDF document text
    • http://songhandiban.com/uploadfile/file/2021091209234573499.pdfIn PDF document text
    • http://agrocare.hu/ckfinder/userfiles/files/49076795241.pdfIn PDF document text
    • http://sydjpg.com/images/upload/file/20210912_095221_160.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/89153278721.pdfIn PDF document text
    • https://mangalargalux.com.br/ckfinder/userfiles/files/tumedepikadenemo.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/161443d68af588---11738632919.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=prayers+of+the+faithful+baptismPDF 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_off0000d4ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BA 10876 bytes
SHA-256: bd38a8752ca7388c4938da16994e13ee4ae291ff2621225280423857fa160dd2
font_01_sfnt_off0000ed9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9F 18036 bytes
SHA-256: d96c0b63ebb1de4552637ce00615343d0061f1406636e2da8733d14381fef8fd
font_02_sfnt_off00011cd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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