Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1e3466f2542588a…

MALICIOUS

PDF

69.1 KB Created: 2021-06-26 12:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cd5f3db2421fb320b4d03b8afa9e2593 SHA-1: 41c6412c3de28400a4647d1f9b4a83022e0337c2 SHA-256: c1e3466f2542588ab4fccbfd1efe2a18fdfcbd2b88e4a8cf575571608c6694d9
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF is identified as a phishing lure due to its image-only nature and embedded links pointing to compromised websites. The document body is heavily obfuscated, but the heuristics indicate it's designed to trick users into clicking through to malicious content. No scripts were extracted, but the presence of numerous links to compromised CMS uploads suggests a phishing campaign.

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/pmo1i50sftldmeom7r9mqptbqn/21555728543.pdf
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/6u6jjqvuaqpockr1g33u9vjqum/87728251538.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/02805b0e9b0fa332015cb469d0e00c51/jojusavif.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dbe59200ae---83230861184.pdf
    • https://efnnma.org/files/file/29321196835.pdf
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/ef3dcf9e105e0bd2d0f53f8f1e05990c/45274191590.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbc238d4123---dakezufijogixisakixukaj.pdf
    • http://travelsi.ru/ckfinder/userfiles/files/57857216740.pdf
    • http://adance0112.com/upfile/editor/file/21088187612.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/6e8155b9f5220198de3a5de37fdccd7a/figizanunalubegis.pdf
    • http://appletechsolutions.com/userfiles/file/punarep.pdf
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/8c70f482739b7f5a2fbd37887665261d/gazesow.pdf
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3264e7861---69443952137.pdf
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/c75a5e3ab1ed5b030df6710d94c12716/61274492244.pdf
    • http://akkoryazilim.com/userfiles/file/wejoduwit.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160841a90b8fb1---28750825202.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/tglku7sqe6elq7lcmhg2m48ao4/85700652084.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bbaf1b1c2a7---78869222515.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/5a54b2a66d02cf8fdfe79c076a465692/woxisozuwidinixasiti.pdf
    • http://infinity-pro.ru/userfiles/file/28687522136.pdf
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16075154777797---90007018741.pdf
    • http://www.alex-vasilkov.ru/images/wisdom/file/sirovaxagivamiwul.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a6942e97e77---39908741291.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=pig+and+baby+pig
    • 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_off0000b739.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB739 16792 bytes
font_01_sfnt_off0000cf50.bin
49c251f24f44aeb3ba84267c86aef55e0ea55d0e316a971fd114b5980acd73d1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF50 10156 bytes
font_02_sfnt_off0000e59f.bin
10a78e0e6680b04493ca06fa493cbc88fc1fe6e7b97cf429aa393685078432b3
pdf-font-stream PDF embedded font (sfnt) at offset 0xE59F 13952 bytes