Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcdb2b11adbda5c3…

MALICIOUS

PDF

231.9 KB Created: 2021-06-30 10:57:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4eae952f5aa507e0374541b596da904a SHA-1: 44fc103a92f2926e885839e0c1c67d534d4ce656 SHA-256: dcdb2b11adbda5c310719c38cecfa0b185f33c59bb9c63df041f62e9117925f9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the nature of the embedded links and the PDF format itself can facilitate the execution of malicious actions, potentially involving JavaScript.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9346

Heuristics 5

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=tyra+banks+married+chris+webber
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/sotugonujefogekiviwuw.pdf
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/foruzavukanisarobeweg.pdf
    • http://minhanh.com/files/76113758510.pdf
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/29730ecf52bf1d51ca64559a33d9d8da/75931837565.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608103443e241---19458046885.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070257a61609---wevufipal.pdf
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089a58d2d517---jupud.pdf
    • http://richmore.kr/uploadfile/fckeditor/file/bafutozafud.pdf
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160da0461a9cbb---96818336828.pdf
    • http://biosite.ru/images/news/file/semifebovipaterodo.pdf
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/36558dd744679cbd632915ab983eae25/19797340986.pdf
    • http://www.mmalappeenranta.com/tiedostot/files/zizokim.pdf
    • https://travelsafeway.com/userfiles/file/lununimazafosolexifirod.pdf
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/15483527276.pdf
    • http://ekachaiguitarist.com/ckfinder/userfiles/files/80306784505.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c12f3eced41---2950168893.pdf
    • http://www.humillacionyestrella.org/ckfinder/userfiles/files/rusowatatevexux.pdf
    • http://accessiblevehicleservices.com/userfiles/file/53951902249.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607418b92f9cc---gevunamulatuxukopexelizi.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2b00a92992---43242791584.pdf
    • https://garyjetcenter.com/wp-content/plugins/super-forms/uploads/php/files/73be3ce436a26890fe63b1acdce8ed96/raxexulidikipigubezano.pdf
    • http://davisfolk.net/clients/1/1f/1f1070e31f35868a9a13f38ee7dc887f/File/58357519159.pdf
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089e1d030b4e---judadotuf.pdf
    • http://caphegiabao.com/upload/fck/file/11069901349.pdf
    • http://asea-admin.com/_userfiles/file/20210504235558.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16086d3c533bfb---kazepatawesewudimov.pdf
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003026f.bin
010ac377f6098f0d6274c9647ac62fb32ba2331cc662af23b7d84541a2d9d0f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x3026F 16436 bytes
font_01_sfnt_off00031954.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x31954 16792 bytes
font_02_sfnt_off00033161.bin
2fbde24cfb4cda9f1b588e34db022fd624e133d76144566f7a53d22adb81b67c
pdf-font-stream PDF embedded font (sfnt) at offset 0x33161 3480 bytes
font_03_sfnt_off00033ed7.bin
879225b02ad637d38e27e33ebe4f8e4613a616b5c959698db40327d20d9dcbad
pdf-font-stream PDF embedded font (sfnt) at offset 0x33ED7 23408 bytes
font_04_sfnt_off00037766.bin
68983e2e333fbc55051023648148e8366e9c373186265da272695b29b11c502e
pdf-font-stream PDF embedded font (sfnt) at offset 0x37766 10764 bytes