Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2471f9b2dca526e…

MALICIOUS

PDF

68.2 KB Created: 2021-09-27 04:34:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 95c08fe62553b50dac7e450f53291c38 SHA-1: 556cb69dfb0b526e3cda9c1ca48bc4100d8db477 SHA-256: b2471f9b2dca526e66fe180d78baecd7c36882d9e46b6eb903b05fa1184b434b
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF is identified as a phishing lure due to its small size and image-heavy content, designed to trick users into clicking embedded links. While no scripts were directly extracted, the PDF structure and heuristic firings suggest it's part of a phishing campaign, likely leading to credential theft or further malware delivery. The presence of numerous links to potentially disposable domains reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • 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.
  • 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 http://thewellmanteam.com/userfiles/files/83810051885.pdf In PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614002aa832e7---94060802379.pdfIn PDF document text
    • http://teleinwestor.com/userfiles/file/32267865676.pdfIn PDF document text
    • http://vietdubai.com/userfiles/file/werujub.pdfIn PDF document text
    • http://bluecreator.biz/ckfinder/userfiles/files/xejaroloraxixikov.pdfIn PDF document text
    • http://falconartistmanagement.com/ckfinder/userfiles/files/21230365250.pdfIn PDF document text
    • https://autotronics.vn/userfiles/file/41050757394.pdfIn PDF document text
    • http://pilanatofishing.com/home/sandbox/domains/shelter.sandbox.tritek.hk/public_html/ckfinder/userfiles/files/nazugudebanaxabowozuref.pdfIn PDF document text
    • https://sieuviet.net/webroot/img/files/xowuro.pdfIn PDF document text
    • https://edusfera.pl/upload/file/26822439957.pdfIn PDF document text
    • https://nabil-doukali.com/userfiles/file/vipakadekazozuwirugimesag.pdfIn PDF document text
    • http://szhlfz.net/upload/laxomewiw.pdfIn PDF document text
    • https://digireg.nu/upload/54574923668.pdfIn PDF document text
    • https://smg.bid/ckfinder_userfiles/files/gojusen.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/2ecb5152679e7a6f8c39e2a29ed0c73e/68109919776.pdfIn PDF document text
    • http://somersetcountybar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jidafaseruwuz.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/nitimatituxakoz.pdfIn PDF document text
    • https://sjamsul-hidajat.id/ck_uploads/uploads/files/sazulamivadojawerokipej.pdfIn PDF document text
    • https://theurbanthinktank.com/files/doxub.pdfIn PDF document text
    • http://sea-cruise.ru/ckfinder/userfiles/files/kasotefudidajegupumorovux.pdfIn PDF document text
    • http://zsdbiopharm.com/upload/files/50405427333.pdfIn PDF document text
    • https://n-v-v.dk/userfiles/file/rawikulatopuziwikirerijog.pdfIn PDF document text
    • http://abbeytraining.net/userfiles/file/rilevudugujukukupegowuwa.pdfIn PDF document text
    • http://maychaybocaocap.com/app/webroot/uploads/files/patewari.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=hebrew+apocrypha+pdfPDF 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_off0000af49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c75b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC75B 14536 bytes
SHA-256: 05829f03e3d763a0f40c5e611fb1c4719cb4a574403805bbba066c81e2121708
font_02_sfnt_off0000ebad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAD 10540 bytes
SHA-256: 26ef3dd50cf9fdd1a738c70a1db188eff5162ee5ff0e3af040de4175248a8168