Malicious PDF — malware analysis report

Static analysis result for SHA-256 6289bb680f55d9c6…

MALICIOUS

PDF

99.3 KB Created: 2021-08-10 21:44:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6c369b857db5238aa7d447f5082577a8 SHA-1: 4a1c5ed7adf16501cc6c429354977a1dc23c97d2 SHA-256: 6289bb680f55d9c6a683392c6df4b275ec65609040927ec20db09d704e1fb5a8
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely used for phishing or distributing further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • 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://akonis.ch/userfiles/files/33858747083.pdf In PDF document text
    • https://silverwayshipping.com/userfiles/file/lobulofujomaraxivije.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/fjns2d43qdbr8kaaq2vi9hlnqs/45953385196.pdfIn PDF document text
    • https://indikino.com/ckfinder/userfiles/files/68359264772.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/afe6253afac7d20990190a23e16257fe/87669523638.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d9a45268701---fozolijop.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/881fc7cfbd540ace9f655548cba1ef72/puraliluxazudexixuw.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/4f07770a555789fa9bb5bf1157a9b7b5/42019744809.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607615c90e1c2---wonosudiporalajofuf.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/gixuf.pdfIn PDF document text
    • https://vili-al.com/uploads/wysiwyg/files/31060912149.pdfIn PDF document text
    • http://asiancfea.org/userfiles/file/dirapaka.pdfIn PDF document text
    • https://anakmeong.com/contents//files/miremes.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608855dd6516b---57683609739.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16090232229572---mafazebuzus.pdfIn PDF document text
    • https://nyig.com/files/file/lanebupisizoro.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac42666b570---80884791817.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/89p242aio8bsv69dfhd959eb1e/97009626180.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/vhh47l97ogouter0gqjbi3ibnc/nimefaz.pdfIn PDF document text
    • http://cuacuonanbinh.com/userfiles/file/dikafuravexube.pdfIn PDF document text
    • http://satakantaresort.com/user_img/files/15416960564.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e7b910c814e---wifukemuzadeda.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/5a45e6168e2ce50ef86e1c9ff86c6ae2/parif.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=welch+allyn+otoscope+user+manualPDF 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_off00011cc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC4 19076 bytes
SHA-256: eb76feb90a7e4ce8e37167cde093789082e76eb4a7fbc3eef91b6293fa697efa
font_01_sfnt_off00014db8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000165cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165CF 10752 bytes
SHA-256: e572f37caf85717fe5486288463ba84fc50c6c6a2c5cb45baa3830faafb879df

Open this report in the interactive analyzer, or submit your own file for analysis.