Malicious PDF — malware analysis report

Static analysis result for SHA-256 332dbdf6d41142a1…

MALICIOUS

PDF

86.1 KB Created: 2021-09-21 16:31:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5203e147559caa54dc114e8d4badfebf SHA-1: 12e2fbd9190f9ad186934e753b4077b9df3d80ce SHA-256: 332dbdf6d41142a1cfdff29186f319a74a3620e678d9c3bb378a0e2bfffeb1a6
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and link farms indicates an attempt to direct users to potentially malicious external content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://donleroy.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jonopujamuso.pdf In PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/papadujotafutuwojuz.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/7e5a5a449571f69ad5408ee08aee06fe/90902275195.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/45217006174.pdfIn PDF document text
    • http://hagelkonzept.com/userfiles/file/niviba.pdfIn PDF document text
    • http://kortennis.co.kr/B/ck/ckfinder/userfiles/files/betuwuxejolologozeluf.pdfIn PDF document text
    • https://educhina.mn/editor/files/jujutuzuxonuguwo.pdfIn PDF document text
    • http://maschimaurizio.it/userfiles/files/63585066090.pdfIn PDF document text
    • http://fitviewer.info/files/file/82336683042.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/161499f7435972---baniwonaroridevutovadariv.pdfIn PDF document text
    • https://dalnoboy.com/data/filestorage/upload/files/86706664049.pdfIn PDF document text
    • http://danies.ru/ckfinder/userfiles/files/nebufizotejiru.pdfIn PDF document text
    • http://phaptangpgvn.net/app/webroot/upload/files/sivel.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/9bf8031aa81b015c99ff4ad1d843592d/potefilotu.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/wulozorasewufa.pdfIn PDF document text
    • https://sunkamalzemecilik.com/userfiles/file/nexukunatuxevajogaxo.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/rafureravapazogukoxa.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/16136c14475852---61649736968.pdfIn PDF document text
    • https://widerbet.pl/userfiles/file/24373925894.pdfIn PDF document text
    • http://investin-khj.ir/ckfinder/userfiles/files/giwekowiretotalefifebi.pdfIn PDF document text
    • http://cuacuontoanthang.com/media/file/66581244886.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149cbf787ea5---ditiwonujipilu.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/e14965e2168d8f6bff83420030c14cfb/33578514159.pdfIn PDF document text
    • http://originalavto.ru/userfiles/file/xasesinelujemufumavi.pdfIn PDF document text
    • http://3wsystems.com/shipinc/userfiles/files/6265563466.pdfIn PDF document text
    • http://lifecontinues.ru/images/files/99456385501.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=best+version+of+kodi+for+firestickPDF 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_off0000ed5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5F 17724 bytes
SHA-256: 6b684ef6bb61c340cc39b3a64566ebb8838e5363f36f27136292b7560de8637d
font_01_sfnt_off00011acf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ACF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000132e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132E6 10472 bytes
SHA-256: 45f3c139ee8aede01868eda6364d25e029fa8b54dc2d9ab1abfc50324f5b7626

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