Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b12c29208a474e0…

MALICIOUS

PDF

75.8 KB Created: 2021-09-01 20:45:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: e315b9d42d49623c1dce9eb09a78736f SHA-1: 6bd4eb414a270b367a8e5c3caada503f268d812f SHA-256: 6b12c29208a474e05330c9387bff84b1366a845ee56af68507d0f20ab6d8bf37
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. It contains numerous external URIs pointing to compromised websites and link farms, suggesting an attempt to redirect users to malicious content. The file's structure and the presence of these links indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

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://allytemp.ru/uplcv?utm_term=advanced+calculus+theory+and+practice+pdf PDF link annotation
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/aa77902dd402a40d411b9cd3ed2575d1/wevujibevaw.pdfIn PDF document text
    • http://sun-green.nl/ckfinder/userfiles/files/51719558690.pdfIn PDF document text
    • http://salocchi.it/userfiles/files/53368328146.pdfIn PDF document text
    • https://apexsafetyproducts.com/ckfinder/userfiles/files/1199731923.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a1543b3ef---20991147885.pdfIn PDF document text
    • http://tutek.eu/userfiles/file/25631117702.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/31447747735.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/3b2snai734gd8v34mmkjovtv80/99448290035.pdfIn PDF document text
    • http://arcadia1973reunion.com/clients/3/33/33cb7023d77084166ed027ca16b579b7/File/47309563054.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160899e7601457---88085503096.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/4ii4078a06r7cls2f35eps8io1/nukimakazipuloxirirosor.pdfIn PDF document text
    • https://ka-base.no/images_students/files/ribiwowulegitetekibu.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160703728e510c---52415380186.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f63d5cc10---54928756973.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755a3ba5b01---dimaxojaxofexikojole.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a45f84a3be5---zegidovanibuwele.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa43ebba7c---jixufitesir.pdfIn PDF document text
    • http://xn--h1acbpobggs.xn--p1ai/data/files/68647370070.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/86397934579.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/798016ddc96f2773a838f5ee73597523/wusonu.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16094fc1da310e---47918972779.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/91593859103.pdfIn PDF document text
    • http://bscsaoner.in/ckfinder/userfiles/files/sivavimifet.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/sesaxemotuxazuxex.pdfIn PDF document text
    • http://didula.com/img/file/60226080786.pdfIn PDF document text
    • http://www.rify.us/cms-uploads/files/xedolemosuboruxuwupef.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/futerumizazogupofede.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC228 17072 bytes
SHA-256: f144fca5552563785a8167b6b105270b7d0713b11e0d07b0cd22eb26cdc44b51
font_01_sfnt_off0000edf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF1 10980 bytes
SHA-256: 09b48604407f6dd2ba2b872ec22cd7d5dd8ec3b53f6130dedfd0b4fdb320c18c
font_02_sfnt_off00010771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10771 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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