Malicious PDF — malware analysis report

Static analysis result for SHA-256 29e968e539477fe9…

MALICIOUS

PDF

74.1 KB Created: 2021-09-04 22:16:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ef324bb712ffefef52a7306237a87df0 SHA-1: 0338289ccd3a2f24c1dc069c6b626464ee4c0cb8 SHA-256: 29e968e539477fe9cd1c5126c6fd4466d30d2c544a854fb7cb5ec43f8d3156da
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or trojan delivery mechanism. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade gateway security. While no scripts were directly extracted, the presence of numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggests a multi-stage download or redirection chain, potentially involving JavaScript.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://mamap.in/ci/userfiles/files/kipeladaketoxogizadukena.pdf In PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7750de774---4388982737.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file///68155511329.pdfIn PDF document text
    • http://sam-global.info/files/file/pulifaw.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bb53fe3a580---luranev.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/16623605073.pdfIn PDF document text
    • http://abpaluso.com/upload/file/52476362414.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b998f291e9d---86140215351.pdfIn PDF document text
    • https://styliststudios.com/imagesTE/file/45579929219.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16072e6303e5e2---86224180331.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a95547d80---wuzisavasupegugesejiz.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a1c19d6c0---godizudik.pdfIn PDF document text
    • http://taemyung.com/data/upload/file/dikitogulesegududesumam.pdfIn PDF document text
    • http://levotst.com/uploads/files/zusalaxisovot.pdfIn PDF document text
    • http://gopherandsquirrelcontrol.com/admin/images/file/47289858278.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c03f4dc0b52---65535624786.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b1356d348---56026327368.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160786589d7400---66798436701.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6246c65f18a692738776f48e33c0a6e6/xixuwukinafitoroxubub.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1607f322435e4c---ziruba.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/16096770d21828---22222487791.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/pci7lkt4664ov5d3jd8cpkj7es/26874763110.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-5/file/mitajafuvekukakepodur.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/b14fee2f1a7b65e97a5353ba2252ddad/buronatigegome.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=arris+tg862g%2Fct+manualPDF 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_off0000bc8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC8F 17176 bytes
SHA-256: 275bdbf59b12cd2238775b1d8e0c8798a8135250c2039cb110823e6c8ec2b27a
font_01_sfnt_off0000e951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE951 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10168 10932 bytes
SHA-256: a8587a9a58286d5bfba985dfee68433173e69d82b7e2dbc696112a4cfa2b01b7

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