Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ed6af16db3c5b1f…

MALICIOUS

PDF

112.6 KB Created: 2021-05-07 04:35:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4b105cb76d9c104a120e37e13230f1a4 SHA-1: 716ef33729a66a65e349898256661de007e0101a SHA-256: 9ed6af16db3c5b1f330653d5812549274b3b9369193b2c9fd9ac36bea42c65c4
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to a site that appears to be a redirector for a download. The document body, though heavily obfuscated, suggests a lure related to downloading a PDF, aligning with phishing or scam tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/strik?utm_term=irregular+verbs+list+with+hindi+meaning+pdf+download PDF link annotation
    • https://sezokifor.weebly.com/uploads/1/3/4/5/134596047/bogeleberuwiku.pdfIn PDF document text
    • https://nimafomu.weebly.com/uploads/1/3/2/7/132710507/wimizede.pdfIn PDF document text
    • http://mikovil.mywebcommunity.org/92183981008.pdfIn PDF document text
    • https://jepejopik.weebly.com/uploads/1/3/4/6/134610321/lurofokel_dijisa_vupoto_xetaliperutadak.pdfIn PDF document text
    • https://madajeguruxe.weebly.com/uploads/1/3/4/3/134348767/55a2c3e3b.pdfIn PDF document text
    • http://gevenukodujojov.getenjoyment.net/54979317163.pdfIn PDF document text
    • http://xuponigivixi.66ghz.com/87573309033.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://betugoxutufaf.epizy.com/kenmore_front_load_washer_error_codes_oe.pdfIn PDF document text
    • http://kixixiwibatogit.epizy.com/22552399008.pdfIn PDF document text
    • http://xuzejoleja.rf.gd/how_to_turn_off_a_doro_phone.pdfIn PDF document text
    • http://magivekuwili.rf.gd/63019604675.pdfIn PDF document text
    • http://nomapalugaji.epizy.com/lupuzu.pdfIn PDF document text
    • http://rixuzomobe.epizy.com/zesebuxatez.pdfIn PDF document text
    • http://guligakifiw.epizy.com/85193656837.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/arkanoid_2_nes_rom.pdfIn PDF document text
    • http://vegobojogaroju.rf.gd/problem_solving_strategies_download.pdfIn PDF document text
    • http://tidosanivowevez.epizy.com/deviga.pdfIn PDF document text
    • https://s3.amazonaws.com/jufowokedunod/51438035708.pdfIn PDF document text
    • http://sagalesokalu.epizy.com/journal_of_atmospheric_and_solar_terrestrial_physics.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013f4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F4B 5684 bytes
SHA-256: d5afe23b4ef6e3066e51c75687545208643a0a762ca789a5af45b1d64e688c76
font_01_sfnt_off00015285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15285 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off00015de8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DE8 11060 bytes
SHA-256: 9070199b848c01f08d94e578a44cb79ee145cc9fdccaa7d65c88b8769715be45
font_03_sfnt_off000183fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x183FC 15596 bytes
SHA-256: 165f8849c96607f5003e139eab14dd3216eb77c3d0db3c818f5bfcc5ecc3a2d3