Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0ebaa9dbe794684…

MALICIOUS

PDF

68.7 KB Created: 2021-09-26 07:48:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: ea5d4b693e936cf93fb2e58f35959864 SHA-1: 895d5b14633ffc6ab398263c6ecf1b93b40c3276 SHA-256: f0ebaa9dbe79468496da89758602e6362d7374afdd0f1f524ef3758966b32697
154 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and is flagged as a phishing lure by multiple heuristics, including ClamAV. It is designed to appear as an image, likely to obscure a malicious link. The document body is heavily obfuscated, but the presence of embedded JavaScript and numerous external URIs on disposable hosting suggests an attempt to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 2 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.
  • 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 https://crysiq.ru/uplcv?utm_term=fine+lock+launcher+for+good+lock+and+galaxy+labs PDF link annotation
    • http://28777886.com/Lpf/UPFILE/userfiles/files/penupuromof.pdfIn PDF document text
    • http://boracayg.com/FileData/ckfinder/files/20210907_864BC88C81946748.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/mliqf4r8gl6unt8epm1cp0ovp7/45169915140.pdfIn PDF document text
    • http://prinsart.ro/uploads/files/befanikeganewib.pdfIn PDF document text
    • http://gemculture.com/userfiles/file/84621360290.pdfIn PDF document text
    • http://geluidsadviesnederland.nl/ckfinder/userfiles/files/93049763198.pdfIn PDF document text
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/54986150202.pdfIn PDF document text
    • http://www.alfapilates.pl/upload/file/49112597244.pdfIn PDF document text
    • https://chambres-a-la-ferme-plouzelambre.fr/userfiles/file/xeridiriravufebakujeken.pdfIn PDF document text
    • https://dienhoanghean.com/upload/ck/files/rulezubevopasurev.pdfIn PDF document text
    • http://josquin-capella.de/download/bunexejuwitibemiwetikize.pdfIn PDF document text
    • https://52fantasies.com/home/holly/public_html/ckfinder/userfiles/files/fexijisepobok.pdfIn PDF document text
    • http://zbraneklapka.cz/ckfinder/userfiles/files/14660183598.pdfIn PDF document text
    • https://uetty.xyz/js/ckfinder/userfiles/files/41520164029.pdfIn PDF document text
    • http://studiomarazzi.eu/userfiles/files/94869628321.pdfIn PDF document text
    • http://jcbcharpentebois.com/ressource/site-image/files/41997731295.pdfIn PDF document text
    • http://www.agot.pl/upload/file/45300194607.pdfIn PDF document text
    • https://aarushimukhwas.idealviews.com/userfiles/files/59486943483.pdfIn PDF document text
    • https://kaisar168.com/contents/files/jusodajuwajipukizid.pdfIn PDF document text
    • https://serka.com/serka/upload/files/56365827412.pdfIn PDF document text
    • https://path.mn/userfiles/files/27874139320.pdfIn PDF document text
    • http://easyliveconstruction.com/ci/userfiles/files/94010343387.pdfIn PDF document text
    • 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_off0000aec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEC3 14440 bytes
SHA-256: ea66af2d7155c528f1911150d39cc98ffe03da42ea2bf38559532050050eff69
font_01_sfnt_off0000d2e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eaf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF8 11180 bytes
SHA-256: 11a06062c46ef5c98e6c45aeafb8d1ba0cd4c56218399ed87ddb5336d34e9dfb