Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e677009b9e968f5…

MALICIOUS

PDF

83.6 KB Created: 2021-09-04 14:12:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 707e4fae48cfb5bbd86bdc917efafc73 SHA-1: 88719879859ed4970a7a870311f73ed1beb750ef SHA-256: 8e677009b9e968f53afa551b350d1339204eca1cfffb4370b6a9ea263a4413b2
164 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to compromised CMS upload storage, suggesting it is part of a phishing or malware distribution scheme. The presence of a download button lure further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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.
  • 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 https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/0fd06d493e1d97bb6e1ce4dd1bf41dfe/wesitojoxepikisazok.pdf In PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/fc4787ba335f9974a0fd91bbf320c6e4/64654446518.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/wusuvaba.pdfIn PDF document text
    • http://mweb.cz/images/file/45423291946.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/c78743b8abf872bd665bba93e24be48b/10702144604.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/j83c6cu86jhlgbvg43j6nhsais/xawejoma.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b29b58d0433---regenodifodozevezudi.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160752d9f16d67---totononagiwifur.pdfIn PDF document text
    • http://dryoucosmeceutical.com/userfiles/files/dawoxawituvajemonikodezaj.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/afb48b06a57a37197078f00561809dc0/50927171035.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/2035d46377a25f0c99ae374bac735b83/81832529592.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/venizixuxufot.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/musebofanumomifuwopa.pdfIn PDF document text
    • https://pioneerlift.com/upfiles/editor/files/14863947025.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/noxebibakarorenagizetiraf.pdfIn PDF document text
    • http://myphamasia.net/upload/files/58615039927.pdfIn PDF document text
    • http://hoacanh.net/luutru/files/38046576237.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/9ea431bd35d4f7764e7cdb1dbd2abd63/33512280937.pdfIn PDF document text
    • http://innersolutions-uk.com/file/47909671670.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160821e226b514---10843061087.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16070daacaedf4---54096927886.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2d12ae237---9135414291.pdfIn PDF document text
    • http://fedime.org/imagenes/56683541388.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=pdf+editor+crack+version+downloadPDF link annotation
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BC 17920 bytes
SHA-256: 7835b8f61e210022f2eb2004ce8c1d543fa36b02a7cce91fa72297bd2a9c4d57
font_01_sfnt_off00011026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11026 10716 bytes
SHA-256: e62b0d140b1e97552595d373c5cd3bbde2bf983b406b4f5c2f01007483bc9f51
font_02_sfnt_off000128f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1