Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab5ef52dd0b1010d…

MALICIOUS

PDF

68.6 KB Created: 2021-09-17 04:30:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 447fb21b701363467b1b0a59aa96d831 SHA-1: 61f8e471fcfd9cee44f9f518871a1d5cec0ff01b SHA-256: ab5ef52dd0b1010da0fa4ea9a75e1550609c3d1603a420ede7e094027060b523
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded JavaScript and is identified as a phishing lure. The document body is heavily obfuscated, but heuristics indicate it's an image-only document designed to trick users into clicking a link. The embedded JavaScript and numerous external URIs, many pointing to compromised CMS uploads or disposable hosting, suggest an attempt to download a second-stage payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • 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 1 text block(s), carries a click-outward action, and is only 68 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.
  • 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 http://cephedanismani.com/images/pages/file/50086810994.pdf In PDF document text
    • http://coumert.com/images/file/safetogipuxu.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/1b189d76abc3cb7115a4e5ef959cf03b/zozevepuvanilozuposejabej.pdfIn PDF document text
    • http://forumts.com/ckfinder/userfiles/files/nuturimedugorenogigironit.pdfIn PDF document text
    • http://www.galiantsolutions.com/emailimages/file/84286319964.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/5039760530.pdfIn PDF document text
    • http://hoteldanang.com/uploads/images/files/78913110024.pdfIn PDF document text
    • http://vikingpaint.com/user_file/file/sobopapugogawewuboli.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143e1e725519---tibeziso.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/zinige.pdfIn PDF document text
    • http://inruho.ru/ckfinder/userfiles/files/59222267390.pdfIn PDF document text
    • http://ssss-sangam.com/userfiles/file/65694195737.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131cddb748f6---71818872553.pdfIn PDF document text
    • http://chataphan.com/file_media/file_image/file/paburaruviw.pdfIn PDF document text
    • http://langmoon.jp/js/upload/files/nilojokutetagarov.pdfIn PDF document text
    • http://stonebreaker.at/tigapimilirudewemikezexi.pdfIn PDF document text
    • http://cdenito.net/userfiles/file/36341973799.pdfIn PDF document text
    • http://lg-palette.com/upload/files/luloxijevufejowowa.pdfIn PDF document text
    • https://filetorme.com/upload/files/mobesimebani.pdfIn PDF document text
    • https://swaarm.de/app/webroot/upload/files/zorokogi.pdfIn PDF document text
    • http://thienthaopc.com/upload/FCK/file/233963674.pdfIn PDF document text
    • http://sgd42.ru/userfiles/file/segatexiwuritomoboxam.pdfIn PDF document text
    • http://npcbalkan.net/ckeditor/ckfinder/userfiles/files/kaniwega.pdfIn PDF document text
    • http://roseeskin.com/userfiles/file/20210915195413.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=ranch+simulator+download+mobile+apkPDF 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_off0000af04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF04 14368 bytes
SHA-256: 89d168dcc0e2b2b90ad31c43709a42e69a4dd0005b8438564fe3c33e9680358c
font_01_sfnt_off0000d29c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD29C 11240 bytes
SHA-256: d44a5bb5d63139d7fd28d650836c40834859e7eecbd3a1ffe394718408853e72
font_02_sfnt_off0000ec9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1