Malicious PDF — malware analysis report

Static analysis result for SHA-256 10d2748cec59dfc2…

MALICIOUS

PDF

61.2 KB Created: 2021-09-25 11:07:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: b1809d723955f2718211a62ab5a15537 SHA-1: dd65cefb5fc91fb5de7ec3ec55caa0897e165274 SHA-256: 10d2748cec59dfc20d3d84e737acb9359317a568c9bfb6401e2daf062bf89815
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URIs that point to various websites, many of which appear to be compromised WordPress installations or disposable hosting. These links are likely intended to redirect users to malicious content or phishing sites. The presence of these links and the nature of the heuristics suggest a phishing or SEO-based malicious content delivery scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5428

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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
  • 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://medvor.ru/uplcv?utm_term=screen+mirroring+from+android+to+laptop PDF link annotation
    • http://www.masozilina.sk/ckfinder/userfiles/files/26512026426.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/5880177029.pdfIn PDF document text
    • http://alltechsro.cz/files/dorililifekanuwanugimuk.pdfIn PDF document text
    • http://lngpetro.com/userfiles/file/degujelixapunozugisova.pdfIn PDF document text
    • https://cokhivietuc.com/img-vietuc/files/liviwudigirofalugoka.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/161377832c8145---rubevalovotawililopix.pdfPDF link annotation
    • https://gtnet-engine.com/ckfinder/userfiles/files/wagagoporekugagizusudobe.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1614ba0ec32e6b---wuwizetizewalepawaja.pdfIn PDF document text
    • http://bong-dem-long.org/upload/editor/files/maxufivuvavibaximawove.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/1227c5df854c666e3216ba0c38796a51/zikusowuf.pdfIn PDF document text
    • http://iqlacpro.vn/emotive/upload/files/pisaxufowopamujige.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614ed8429f537---41674319010.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/428971ba8f205158fb3575277bd73108/70953909124.pdfIn PDF document text
    • http://vanhacollection.com/images/files/11875672211.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130b052bfa40---53940678614.pdfIn PDF document text
    • https://twinslock.com/ckfinder/userfiles/files/juzaw.pdfIn PDF document text
    • http://xn--90aoa5aj.xn--p1ai/ckfinder/userfiles/files/83030125883.pdfIn PDF document text
    • http://vividconcept.in/userfiles/file/veravakuno.pdfIn PDF document text
    • http://inannamsao.com/uploads/files/wiwupunenili.pdfIn PDF document text
    • https://onecre.com/images/content/files/pakimur.pdfIn PDF document text
    • https://maytinhdalat.vn/images/uploads/files/jolexuzunufuvakobiluxuwet.pdfIn PDF document text
    • http://toyotarent.tw/FileData/ckfinder/files/20210910_90B16932421F1019.pdfIn PDF document text
    • https://aventura-agence.lu/userfiles/files/77894753560.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB381 15652 bytes
SHA-256: a2db226eaaa06dca85e9f5ae05585342f1c12fd9cf465a3141d2eb5d0df93652
font_01_sfnt_off0000db45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1