Malicious PDF — malware analysis report

Static analysis result for SHA-256 00efb7a03d576a4b…

MALICIOUS

PDF

145.8 KB Created: 2021-06-27 14:45:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f42124a94573956a4750a83b7dcef583 SHA-1: caebd837af90a6236f2ef169fd207263977ca05f SHA-256: 00efb7a03d576a4bfb1f8b81011a86857e1c6558618e191f882b00171156099d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple domains, many of which are hosted on disposable infrastructure or compromised CMS uploads, suggesting a phishing or malware distribution attempt. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9358

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://mk-promotions.com/ckfinder/userfiles/files/texawibexepe.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd3c395f39---jegabogodovubaratanoxebit.pdf
    • https://ibeguiristain.com/userfiles/files/51796351140.pdf
    • http://streathamtaxi.com/survey/userfiles/files/rewosamomimizolibulefa.pdf
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/0g8uqvmegr1ob7nk0v6pkg8m4i/65940080769.pdf
    • http://altelaw.com/uploads/image/file/jonufokizorilogufitovosoz.pdf
    • https://eyetracking.pl/userfiles/file/sirigadu.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c8efc14e0da---97887240546.pdf
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2d99bd38e---soziganosopudipi.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/sp2ts8nvtrqt99dmkg4k5kpsum/gizigerobavewi.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/qe2ffivhkp70p1fl51vt4uc8ad/fufaxetatoguzuzo.pdf
    • http://star-transform-moscow.ru/uimg/files/23325566277.pdf
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/uhvaabqp09cmpm00bks0gldkhm/61504939459.pdf
    • http://aaykpn.com/uploads/editor/files/sujenob.pdf
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16087435ee7970---kuvegutejuzudijutogu.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608282aa7b86b---9864567128.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/c388bc23409b7d495de0709fa5989919/81698255811.pdf
    • http://brandnewgoods.net/userfiles/file/32530834293.pdf
    • http://arci-mp.fr/admin/File/wimudojanekisujarokuduno.pdf
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/1dpm3n2tf5a76hgf10837o07oj/gesofipepebep.pdf
    • http://asijskepotraviny.cz/files/file/44528357722.pdf
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/pd1nld2179gl4sb9h1p8bidp53/sonadegefogamewujebezo.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/2q8htk9g688hj302noosv02ue6/movijizazuluniwitutiwom.pdf
    • http://doyen.cc/images/upload/File/zafopuv.pdf
    • https://bevelec.com/bevelec/dossierMois/file/juxutenevofifomikaxavaxu.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd474f99bca---rigurerota.pdf
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/9598218ad4171eaac22a1584a9fca937/56896245073.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/64ea50ed58d6d8749919196b93f6ea8f/49073045627.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=109+kwh+cost
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001cb71.bin
d20f0115efc3d4786789589d2a0242e189e0ec04f7b8cd34f3a59a4d5d859acf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CB71 2204 bytes
font_01_sfnt_off0001d53e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D53E 16792 bytes
font_02_sfnt_off0001ed55.bin
6179d2991f71e836cca08cf9236f9b2797c35b346386e293d38418338ec541e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1ED55 10116 bytes
font_03_sfnt_off0002042b.bin
0460d0b96a258d2715cdcc8b25f9825e70ca927e861693552f40403e3cc4917b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2042B 20552 bytes

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