Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3f5459f0dc0f869…

MALICIOUS

PDF

89.4 KB Created: 2021-06-30 09:41:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e86dd14ce827c4aca3bfd0a12be66d15 SHA-1: b0e59444d43a60828fd35a84f9bc603f674bf819 SHA-256: b3f5459f0dc0f869c9f8a57d429ad043ad39182782d5dad5062248ec7b5c6e4b
164 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate it functions as a link farm, hosting numerous links on compromised WordPress sites, likely to distribute further malicious content. The presence of a visual download button lure reinforces the phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983253b085a---kevakesoxijefulutawik.pdf
    • https://nadinerogger.ch/userfiles/files/6063142947.pdf
    • http://kasintorn.com/images/upload/files/tobuxikinew.pdf
    • http://adaviestransportltd.com/userfiles/file/femixewawowe.pdf
    • http://jnafarms.com/clients/864068/File/66635980429.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160931219116c9---nofubolepobaze.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cebcd9943f---zuzimenusivuresixugopis.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160758c5aa7fb3---bevezevojarevomopawuwasa.pdf
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083eedad2250---6060630379.pdf
    • http://sarlampa.ru/upload_picture/97667359629.pdf
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/46fadf516a98d2c2c01cfa66a83e6e51/87711026675.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b0720ee84f1---59125642365.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076519d391be---51158175035.pdf
    • http://aksoysilver.com/files/file///42125160692.pdf
    • http://sme1970reunion.com/clients/7/78/786f1e38e9ed540b4a7d4f5dbcc09398/File/robapezatujipe.pdf
    • https://dm288.com/slicice/file/zifotakuzu.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a6f4282bde---7752605901.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb7cf04b93---sekinoranaxukefukisirixa.pdf
    • http://hilltop1976.com/clients/24685/File/todafixomofiterimo.pdf
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/ml3ddtg2nfsecibpqdtk0n00qr/10341821139.pdf
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/ce2ca3e812fde9cc162782660cfda909/13570030329.pdf
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfd239f158---talenagadavovuna.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/82953886628c796d9d1a576838dccc5e/bopibujutijukisegev.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/09c18284032ed6de079f71da76a81503/lirubinarigugu.pdf
    • http://wjvanderheidedienstverlening.nl/uploads/file/benipivije.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=cocktail+tamil+full+movie+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_off0000fb1d.bin
67870c5f86c152146f382ba865906703816c50006209b21754dac678b3b4d68b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1D 16988 bytes
font_01_sfnt_off00012766.bin
8e7397e530e21a23c34d9fe7d5eab3f8351a6988d0d7f2cba132659792f054c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x12766 10744 bytes
font_02_sfnt_off0001402c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1402C 16792 bytes