Malicious PDF — malware analysis report

Static analysis result for SHA-256 fead89077888afdc…

MALICIOUS

PDF

101.9 KB Created: 2021-07-27 04:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 65332a4657fc50861d3847740841c7d0 SHA-1: 3b15d62adc5c93144764d4e7e4c9ec1cfcdaaecc SHA-256: fead89077888afdcefccc7a1df79d60cbd9608151507dcb6bb36bd29282a6014
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://reitinguok.lt/userfiles/file/93179616129.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e44b4d4ec1b---35333984478.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d884d361d3---40286653376.pdf
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160869b583ec0c---zopelokojajavukunafofilar.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/maoovgtaiie61s5p14g1vak4a3/lujafaxizasaxatenavewuz.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bc77f687390---tataki.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160984eb80e3fe---nutotunowutosekozebix.pdf
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/456c328d9005e8cad3a57cc0fbed5d02/60180320887.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/58572c111eed454230d68ce64f553e3d/wowelosizazemikuvakad.pdf
    • http://ressourcengarten.de/azubi/userfiles/files/78661770676.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d65c8e100---80821825208.pdf
    • https://sunwayhk.com/louis/STARKGROUP/ckfinder/userfiles/files/falowopizovixamux.pdf
    • http://famillespourstarlight.com/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/71816528576.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b97f1ba6f17---63856589388.pdf
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/df7f7321ef2c8aab86597f62fcb1ac10/mapijeragokosuterino.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b120cc43a3b9b2e03bec0a13b0d5a871/revisowarikejulozem.pdf
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/addf36b805647cbfe50626922b3def48/47837659795.pdf
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/15fc0ba412c0f462980ad07ad41defb2/luzixofefogudomogigux.pdf
    • http://gdbchurch.com/clients/43262/File/44536472821.pdf
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/citc2bvd268ddtkik59g708dh2/podijuzumavexojuxafi.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b01a4c76f---pasovonitibefeniwamos.pdf
    • http://maslatalaia.com/userfiles/file/11493963001.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf85039e81---19683254698.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=agilent+gc+7890a+maintenance+manual
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012855.bin
2e08bd4a38a19c6dc700dc3934abfb6fcefecb1255b1731bd97dfcc81c12e86b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12855 18104 bytes
font_01_sfnt_off0001581c.bin
1e71241639839caac930e9eb6657d17502d1ad373f2fee5838ac077601ef077c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1581C 10812 bytes
font_02_sfnt_off0001712d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1712D 16792 bytes

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