Malicious PDF — malware analysis report

Static analysis result for SHA-256 b018d288ddbf7f0f…

MALICIOUS

PDF

79.2 KB Created: 2021-06-28 01:31:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dd568bd4835874062b86d572904dfb47 SHA-1: 71d56cb8e692613e08490fab951f19f8e64c4f05 SHA-256: b018d288ddbf7f0f8a1be8c2a8536ff23c489b09f393624affc3b7f2d798f258
156 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting. These links likely serve to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://industrialdevices.in/uploads/66980610329.pdf
    • http://xedaptap.net/userfiles/file/tenapet.pdf
    • http://tubietelbar.hu/uploadfile/25565067132.pdf
    • http://sehs67.com/clients/e/e0/e078d4d0076166a7bb489ca3b3a583ab/File/69967872224.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/jmbe8c1fbfa3vrbcml873f6tco/34451727369.pdf
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/0j138onlnl3aevg6vn4ur50enq/tivibosazetuk.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a32a5a6797---23416464375.pdf
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160991824291a2---dulinebewad.pdf
    • https://beaszemin.com/files/71236208447.pdf
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/8ec6eda9ec323b819541f942edbc1a12/pededuganaja.pdf
    • https://arerp.kr/data/file///97931807243.pdf
    • http://adamlegal.com/userfiles/file/49939924902.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/a126db8eb092168fc60cf8538b1213d9/83453955062.pdf
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/34583561363.pdf
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/6a443f71eda6c389d9a5727532b151f6/4643507834.pdf
    • http://casaatlantida.com/userfiles/file///gesisor.pdf
    • http://haphadoor.com/upload/files/sawozileludu.pdf
    • http://mofrantech.com/userfiles/file/norawozutukexomelija.pdf
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/bituw.pdf
    • https://alexandrapanayotou.com/web/images/static/file/bodomosum.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2879b66d49---sewuribelod.pdf
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aa80ede1604---gotobijoxelemalevifilan.pdf
    • http://drapa-technika.cz/UserFiles/File/vepupepif.pdf
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/84cf9029d8875b896c4309e200615299/bivaraboxidojipitejoxewod.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081d4dc4296d---laxawegeduvukepibune.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=music+touch+it+remix
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d245.bin
da2211a839dd2b3dec115f495608d14c5c64bf6be274540a0e28f479e71150ad
pdf-font-stream PDF embedded font (sfnt) at offset 0xD245 10380 bytes
font_01_sfnt_off0000e9cd.bin
3097e334f489340a28ea3c588b7c49a76030cc55f0de340c47a12ac297a6738f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CD 17672 bytes
font_02_sfnt_off0001178b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1178B 16792 bytes