Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aa2e12cc7dce257…

MALICIOUS

PDF

90.5 KB Created: 2021-07-18 03:31:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fe5081efe128d95746a5781427bc4640 SHA-1: 726c7617a66d9d98b7240d4337444ceee8930db7 SHA-256: 4aa2e12cc7dce2578c7f752074438d3a1cef068bf7a2fe2bf93d2ee918b2e04e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm pointing to multiple compromised WordPress sites, likely intended to redirect users to malicious content or phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were directly extracted, the nature of the link farm suggests it's part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9746

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://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0e5b89004---72185333465.pdf In PDF document text
    • https://al-wesam.com/userfiles/files/nuvosifizuwufiji.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607475e5d7b13---45264859453.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/a9448c5a89fc57ec3f0e5f54685223ff/72810193446.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/l1duc3eplkh7b64v95darl3np9/fawipavilodesajalegetetuf.pdfIn PDF document text
    • https://rinducm1.com/contents//files/40575411908.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/6458e8860d25dcea07c95d23412669ac/82210583209.pdfIn PDF document text
    • https://balajihighfields.in/userfiles/file/80737010413.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/67tajl7j43j38ver8hk4l8059l/zokuxeberodazosexejulewu.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780be414833---89417623471.pdfIn PDF document text
    • http://meta-min.com/files/bujejudikerivuv.pdfIn PDF document text
    • http://nitexprofi.cz/userfiles/file/42267909220.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/wuxig.pdfIn PDF document text
    • http://granitemountainranch.net/userimages/pinekowojatuzajutuzex.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/db7dq7ib0rdtlt5o8nm2k7lkuj/gijaregelerazerim.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/suvajapubebujirazadetoviv.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/rlaemmpakfeetl3nv3l03pf2a0/keluronopix.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf3735cd2a---laduzenowenomike.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/e817ea0821f308d0a31ae75221de1f38/16740058938.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbce74ae5b5---50868949316.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/43095746889.pdfIn PDF document text
    • https://chiataiec.com/userfiles/Proj_Name//files/2608801440.pdfIn PDF document text
    • https://daotaolaixesontay.com/uploads/file/lolawor.pdfIn PDF document text
    • http://waltonjohnsonfamily.com/clients/870437/File/sizobojuseb.pdfIn PDF document text
    • https://sca-kc.com/scauserfiles/files/42384537196.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16098bf861d2c8---sutoremakes.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/molaguketovox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=what+is+the+plural+form+of+bossPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010aad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAD 1712 bytes
SHA-256: b818e08caa02e65204dbfa3b779ade9aa75dea75b4b35e0ae513425f78de0ec2
font_02_sfnt_off000112cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112CF 10752 bytes
SHA-256: a9d6a59392e378e8ae5f5a046b6c2bfd186c0776cc6a3cb7147ea52c1f899be0
font_03_sfnt_off00012b53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B53 18604 bytes
SHA-256: afe209f824c3e7d339a36bccf3cf0df6c191ae35e201f9735d9d993d13a35c3c

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