Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd1f7bdedd142cc7…

MALICIOUS

PDF

80.5 KB Created: 2021-09-03 20:29:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f4765ca4df0ffa5c15bc3888f7cf047a SHA-1: b11a5546098f7a922c99de76cbd250809eb8eeed SHA-256: dd1f7bdedd142cc727547238a4f8808cde3693386178c8c3e554bb0951d2a648
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple domains, many of which are associated with compromised CMS uploads or disposable hosting, indicating a phishing or redirection scheme. ClamAV and ML classifiers strongly indicate malicious intent, likely to lure users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 https://eternalbliss.net/file/sotejamodixufoboj.pdf In PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4db770771---mutinijupibijigof.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1ece4d779---vaxiburimukaz.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/tmp/24825059865.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/rulalamifusujujavugijil.pdfIn PDF document text
    • http://xn--80age2amlc.xn--80adxhks/pics/images/file/19452828748.pdfIn PDF document text
    • http://asokmontridental.com/userfiles/file/pirosexag.pdfIn PDF document text
    • https://marblobathware.com/app/webroot/img/files/raparasoxologenapo.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be1d047a417---zaveparod.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/10321655245.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/bmt2f7rl3d9lgg2cdp12cg5a6p/71457091384.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/99501154323.pdfIn PDF document text
    • https://aihr-iadh.org/uploads/FCK_files/file/zifufikoxaw.pdfIn PDF document text
    • http://vinhhangvien.com/upload/files/15539940484.pdfIn PDF document text
    • http://arebiatours.com/uploads/files/zutikapozoloronogut.pdfIn PDF document text
    • http://yalcinsezer.com/upload/ckfinder/files/70227186845.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d495627a8b---20975736656.pdfIn PDF document text
    • http://prodottoitalia.eu/userfiles/files/jovoterem.pdfIn PDF document text
    • http://sochi-polyana.com/ckfinder/userfiles/files/zajatejukurutifunoduwut.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/gugovitazowugagokoniwel.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/oitm9u48112n91b3po1jm14vmd/gejajirukara.pdfIn PDF document text
    • https://bselink.com/userfiles/file/dalup.pdfIn PDF document text
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/97f11e9917a2b4c7569770015f558f62/gorugeninoselurutizok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=agnes+heller+historia+y+vida+cotidiana+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_off0000d13b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD13B 11060 bytes
SHA-256: 6df92760e88b685fa2a37fd72dbb496b5a20c0252e42de220ef4c42ad9065ae2
font_01_sfnt_off0000eace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000102e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E0 19948 bytes
SHA-256: 8b3d0eaceba88165b9f86da581460bf86f0dabb0b85123237965cdcbbe843d1d

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