Malicious PDF — malware analysis report

Static analysis result for SHA-256 33d5cbb23aef344f…

MALICIOUS

PDF

243.3 KB Created: 2021-04-16 07:47:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 75fd509884d394b828650362688b1e4d SHA-1: aeb3f5f9686d2274b5f0896d91a9f59edcaf22b2 SHA-256: 33d5cbb23aef344f041d677fc1091cb0e6f74328dd5d222c04d22a555985dd6d
136 Risk Score

Malware Insights

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

The PDF contains a lure related to a 'clock template png' and redirects to a suspicious URL, indicating a phishing or malware distribution attempt. ClamAV detected this file as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6582

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://seumenha.ru/strik?utm_term=clock+template+png PDF link annotation
    • http://verenica.net/pifujey3qks.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374860/normal_5fc7f0512b728.pdfIn PDF document text
    • http://visionnew.xyz/bluestacks_3_android_emulator_for_pc5w9av.pdfIn PDF document text
    • https://cdn.sqhk.co/livulopo/hhcFijO/92672397394.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494165/normal_601e97ce90f35.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481156/normal_5ff5e89734db2.pdfIn PDF document text
    • http://gavolav.mywebcommunity.org/acquisitions_incorporated_book_free_download.pdfIn PDF document text
    • http://kuzexamipapoxip.medianewsonline.com/diary_of_a_wimpy_kid_free_movie_rodrick_rules.pdfIn PDF document text
    • https://cdn.sqhk.co/makekajet/hjvfutO/wojexusolopojo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407991/normal_5fc9360a721fe.pdfIn PDF document text
    • https://cdn.sqhk.co/mejofiwog/ihaShcA/19522200102.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476015/normal_604849eb151c1.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/KKpggwO/zovimijebori.pdfIn PDF document text
    • https://cdn.sqhk.co/nawiwola/csPhihe/63290440052.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://kurevudofub.epizy.com/7800601503.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/bafx_obd2_pairing_code.pdfIn PDF document text
    • http://bodamuma.rf.gd/bootstrap_4_form_row_spacing.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/smartsheet_if_statement.pdfIn PDF document text
    • http://zesafemumibow.myartsonline.com/damituzerodekamaxo.pdfIn PDF document text
    • http://xinifaduzinuvu.onlinewebshop.net/silk_alessandro_baricco_free_download.pdfIn PDF document text
    • http://bigobawavelig.epizy.com/korepolasodeguturonowesej.pdfIn PDF document text
    • http://zigubogujivo.epizy.com/diwadite.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/nccn_guidelines_for_breast_cancer_screening_2019.pdfIn PDF document text
    • http://toxifiv.myartsonline.com/lokokanapejumezigowel.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://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0001886c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1886C 147496 bytes
SHA-256: 1c6f2a52131b8b850273ca32aff5638155e9e90f7bbc8139c19e841d86f1c960
font_01_sfnt_off00033d25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33D25 4948 bytes
SHA-256: 32b1926f2da0fe7e946514f5b87332a7aad7933be0ed04511a77a45a1996a8a4
font_02_sfnt_off00034deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34DEB 5268 bytes
SHA-256: d349d5da8a878f5d4455c99522f3291da1f78329999ae25c395e2373c5005aca
font_03_sfnt_off00035edb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35EDB 2040 bytes
SHA-256: b16900f11dd63b40ac8bac3a61101dc06a968259a5733d55e5f730d0f465d303
font_04_sfnt_off000367a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x367A7 6384 bytes
SHA-256: 45c269446a8b1054177081230455c7c103b20af3aa25fd459695d32b601a514b
font_05_sfnt_off000376e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x376E3 12696 bytes
SHA-256: 3ba6a4d45921abb08786d4b1f40f5fa4a4b421d6d798bb97a69f0d65959b7737
font_06_sfnt_off0003a1e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3A1E1 18096 bytes
SHA-256: 5352969bb276d11e4796b082938f1c96301a492cc264fe804725277db409407b