Malicious PDF — malware analysis report

Static analysis result for SHA-256 abc3e14ba9a50440…

MALICIOUS

PDF

73.3 KB Created: 2021-09-27 11:30:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 29ac9f9be864930b197465052c2faf45 SHA-1: 903757b42f9f0495bc16621420a001bab0f5d77d SHA-256: abc3e14ba9a50440627f5ad3b96278effc8aa8c3515f9b77931b50257d8613fa
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to compromised websites, suggesting an attempt to trick users into downloading further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://cosmeticdermatologymiamibeach.com/uploads/data/files/tajoxivexa.pdf
    • https://hankilfood.com/userfiles/file/20210927135904.pdf
    • http://collectifff.be/imgdb/accueil/files/56583587966.pdf
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/51573689145.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b6c7c38c6b---jolejivavo.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/161408e905a627---79975000584.pdf
    • https://dalton-english.com/userfiles/file/jowolebimilebupumovebotel.pdf
    • https://tsafar.ir/basefile/tsafarir/files/8701831811.pdf
    • http://savitapiti.org/ckfinder/userfiles/files/93497134552.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1614d594cc1cba---kosomunezotez.pdf
    • https://taechoclub.com/FileData/ckfinder/files/20210927_1DCC57C0914E4255.pdf
    • http://alisawedding.com/upload/users/files/luwirenadumijewojirofebab.pdf
    • http://sahamit.net/userfiles/file/47938246816.pdf
    • http://rongqichem.com/upload/files/56880905801.pdf
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/zitaretatebeneragedore.pdf
    • http://garagehayashi.com/js/upload/files/gatulat.pdf
    • http://africalegal.nl/userfiles/file/safono.pdf
    • http://solmoda.it/userfiles/files/xoranebomovugomesipewoj.pdf
    • https://atasuorganiktarim.com/upload/ckfinder/files/69944758379.pdf
    • https://hotelpancharatna.com/assets/userfiles/files/68981012747.pdf
    • http://barcabianca.eu/upload/file/27541409101.pdf
    • http://domario.ru/userfiles/file/tifipebojisapejov.pdf
    • https://havadisname.com/upload/ckfinder/files/63741761913.pdf
    • https://mayphotocopydogia.com/upload/files/1995797365.pdf
    • http://momsystem.ru/public/file/24825207990.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=astro+apk+free+download
    • 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_off0000b843.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB843 16792 bytes
font_01_sfnt_off0000d055.bin
3b07dd17195135783d9f352ea86ab66058edf2e3f75aefb99fd70eb0e1fd19da
pdf-font-stream PDF embedded font (sfnt) at offset 0xD055 18048 bytes
font_02_sfnt_off0000ff33.bin
6caee7ffb53d3e573b7abd284436a4375be0328d158715b3b5d6463d4d750ae2
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF33 10560 bytes