Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d43f629c45fefdc…

MALICIOUS

PDF

83.6 KB Created: 2021-09-02 13:15:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7e3e6499ba462e285968dcbfe0e66b59 SHA-1: 3797ab0ab217ecfdb96a9caaa92835e7546fafcb SHA-256: 0d43f629c45fefdcb590b3209953433c0d2190e3c608fa061d00e038d2fff421
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous embedded URLs, many pointing to compromised or disposable domains, suggesting it functions as a link farm to lure victims to malicious sites. The `PDF_SEO_DISPOSABLE_LINK_FARM` and `PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM` heuristics further support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://greensquares.in/userfiles/file///gelenebabibodinikipifu.pdf In PDF document text
    • https://bodegoncriollo.com/userfiles/file/dalefubowazevosiw.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f78823da6f---12566571742.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/3e6919dd8a7748b8ac0571863f1a857a/91236106987.pdfIn PDF document text
    • https://bulgariapools.com/contents//files/92241925251.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/wetokexipiser.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160ae09fd38b04---4277937171.pdfIn PDF document text
    • https://jerseyshorepirates.com/userfiles/files/85103483567.pdfIn PDF document text
    • https://thekolkatapackersmovers.com/ckfinder/userfiles/files/61754626739.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac100a3b75---mutevimuwagosowiri.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/34733870742.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16125300063e9b---34690072491.pdfIn PDF document text
    • http://prplus4u.com/ckupload/files/50115787634.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/79642133310.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/qn5l9spkr0g9afi2gquu0ip6ep/96153906662.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/82780599187.pdfIn PDF document text
    • http://novichiha.ru/pic/file/wudek.pdfIn PDF document text
    • http://www.mariabeckmann.com/fotos/uploads/files/68619316342.pdfIn PDF document text
    • http://decom.pro/admin/ckfinder/userfiles/files/rulesibiletojetenigem.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/57205605092.pdfIn PDF document text
    • https://gulceoyunlar.com/calisma2/files/uploads/gurulijupevabosasewam.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/files/rusumisixise.pdfIn PDF document text
    • https://editions-tlp.fr/ckfinder/userfiles/files/bexefotinupikodowip.pdfIn PDF document text
    • http://feg.vn/uploads/files/45587287120.pdfIn PDF document text
    • http://tcihk.com/userfiles/misuzebevukezozeraguti.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/ro2dmnf48ods2b9pip0gf5i1b6/nepanuda.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=do+you+mind+if+i+cancel+gary+janetti+pdfPDF 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_off0000de15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE15 11140 bytes
SHA-256: e9de59dddd92eaf7ca8a3ce143867da280f8d11b776e322ca40c7a84b6fcf52a
font_01_sfnt_off0000f7db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DB 18348 bytes
SHA-256: da3e7932aec10e61caa1f26192d94cab7eb2425f940a0524c8f5c6d56fae7a5e
font_02_sfnt_off00012843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12843 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.