Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eebd74c6754e584…

MALICIOUS

PDF

85.0 KB Created: 2021-09-15 16:54:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7bc45be7a685c50029a1e437e51c8e1b SHA-1: 2f3b14286ddf1312dd3a11687d83ca775e085905 SHA-256: 1eebd74c6754e5847d4df99bbb550f32406e32d0321fd62727d78caffe2494ef
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains numerous links to compromised websites and disposable hosting, suggesting a phishing or malware distribution attempt. The presence of a 'download button' heuristic further supports a lure-based attack pattern. No scripts were extracted, but the overall structure and URL findings point to a phishing or downloader campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://sanarina-coaching.de/ckfinder/userfiles/files/64883765393.pdf In PDF document text
    • http://xn----ftbkdcamitb5h.xn--p1acf/files/fck/file/ratimalid.pdfIn PDF document text
    • http://montpellier-businessplan.eu/mbp/upload/images/images/upload/ckfinder/wovefananaza.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/161320e00b0230---dakevivamaj.pdfIn PDF document text
    • http://bulgankhangai.mn/userfiles/files/84376291552.pdfIn PDF document text
    • http://frchem.cn/upload/files/fitevolejurubofatemabuti.pdfIn PDF document text
    • http://gongotour.com/FileData/ckfinder/files/20210905_A467188C097083C2.pdfIn PDF document text
    • https://edusfera.pl/upload/file/lezetex.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613dde262cee4---ditewux.pdfIn PDF document text
    • http://pp-aqua.com/userfiles/files/838168378.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/nuzumonazidivulesogixuwi.pdfIn PDF document text
    • https://medosojewellery.com/userfiles/files/61244150941.pdfIn PDF document text
    • http://smsgurugram.com/miet/assets/files/16752377583.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/deputozizupuwoz.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/wiletaxadukadoferefilubop.pdfIn PDF document text
    • http://flagrant-desir.com/userfiles/file/gomajef.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613638696b9f0---nirawabupuradi.pdfIn PDF document text
    • http://patanamachine.com/imgUpload/files/3423203744.pdfIn PDF document text
    • https://maharajganjtimes.com/assets/ckfinder/core/connector/php/uploads/files/22512860847.pdfIn PDF document text
    • https://theloneranger.tv/clients/loneranger/ckfinder/userfiles/files/buzodozijag.pdfIn PDF document text
    • https://irish-setter-zucht.info/ckfinder/userfiles/files/5713899990.pdfIn PDF document text
    • https://xistenze.nagydavid.com/files/files/kenidotikemilep.pdfIn PDF document text
    • http://nwatchonline.net/userfiles/file/radurojuvalulisujireme.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/vuwataviduxomajuxudimon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=ben+10+omniverse+free+mod+apkPDF 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_off0000e12f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF941 19492 bytes
SHA-256: 03e7c6277ca1dfd4d5f17afe01531cdb07e7383fc88c191043decdef80ccc2ec
font_02_sfnt_off00012d46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D46 10900 bytes
SHA-256: 4af878c7ceb09fcbde0e8a7673accb6fb615723a63437a2910346c3b4d98ebda