Malicious PDF — malware analysis report

Static analysis result for SHA-256 7efc8b0b4799febf…

MALICIOUS

PDF

87.9 KB Created: 2021-08-14 12:25:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e1a766904f6c2743732c03c82a14e82c SHA-1: e548eaedcb07bb8d8dc22c5e177ad32f54d84224 SHA-256: 7efc8b0b4799febf93b01b2308d494172ec924947cec4d9e6294d03a779ac922
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories and other disposable hosting. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a0c85a3bc---15392167432.pdf In PDF document text
    • https://tese.in/ckfinder/userfiles/files/wifiduvilidamiruvevabeg.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/ab57bf8bc94709f0fd19041526721a9b/2521332611.pdfIn PDF document text
    • https://ibeguiristain.com/userfiles/files/losuzopunapulubomaxef.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/su92l219ir5i9tkrdnnhi78dl8/17094472783.pdfIn PDF document text
    • http://ruilong-ironwork.com/CKEdit/upload/files/rirebij.pdfIn PDF document text
    • http://sbox-technology.com/upload/datoteke/rivelajejabimama.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160be31ece3d7b---dukoxegajimu.pdfIn PDF document text
    • http://dataction.org/demo/dataction/media/85300295176.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/4d3b51f2588c4af5fc0d3a6dd6a430d7/8397610078.pdfIn PDF document text
    • https://saikekanglun.com/filespath/files/20210805044219.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094864e0ebac---riwujijokoxubelawadob.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f2c14e13727---vitomopivakeb.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/53e38c4714b1020dee3c8deed319d06c/83779100603.pdfIn PDF document text
    • https://worldcastlive.com/userfiles/file/naxoxuwotidazadatupo.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb735e64f67---11267104647.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/202163151377555.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092b8e35aa5b---37552301926.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2ccbebbc9---vajixufulupuzugi.pdfIn PDF document text
    • http://misosmile.com/upload/editor/files/vowisixebafowibira.pdfIn PDF document text
    • http://arkystudio.eu/userfiles/files/80058638903.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c70b0ae0e4d---61830419347.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/4qtfcggvmsj6003j338sen8u77/88550893627.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/13809350344.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=5e+lesson+plan+template+google+docsPDF 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_off0000f57e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57E 10700 bytes
SHA-256: ba1c52f94caf167fbcb3616b1c3da22172e022873972fdbd6993401bfa5f3f81
font_01_sfnt_off00010de0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE0 16612 bytes
SHA-256: d11f006ba9af130df89ccc0b27cb58b301c085dffd581da278ad6bc7c636a421
font_02_sfnt_off0001395d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1395D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1