Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4b0cfa0695a5ab0…

MALICIOUS

PDF

76.7 KB Created: 2021-03-22 06:29:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 6dbcf0bea63e14e107eeb2bcee90ad38 SHA-1: 63f8856c7f72dc86cdffd5a10c6641e4efd694e4 SHA-256: d4b0cfa0695a5ab0807faea373c80a579696a4d62320ed71e22dc91e0f7fca36
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically linking to a site offering 'game of thrones season 7 episode 1 download tamilrockers'. This, combined with the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic and ClamAV detection as 'Pdf.Phishing.Trojan', strongly suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata related to the file's creation, reinforcing the context of a potentially malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://nipisod.ru/strik?utm_term=game+of+thrones+season+7+episode+1+download+tamilrockers PDF link annotation
    • http://rabuvuz.22web.org/acura_2019_ilx_manual.pdfIn PDF document text
    • http://junumidutuzakox.getenjoyment.net/curriculum_vitae_format_for_teacher.pdfIn PDF document text
    • http://submonster.xyz/how_to_start_an_evaluation_essay_introductionb2rx1.pdfIn PDF document text
    • http://copytoshka.ru/tidogopavol3xszf.pdfIn PDF document text
    • http://nakrutkavk.site/good_spin_questionspzsqc.pdfIn PDF document text
    • http://kerutugizuxig.mygamesonline.org/freckle_juice_activities.pdfIn PDF document text
    • http://mushygushysayings.com/xokodofetiwafubesebothfqo5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wenibeliso.atwebpages.com/what_makes_a_winner_quotes.pdfIn PDF document text
    • http://livuwiga.rf.gd/rational_inequalities_examples_with_answers.pdfIn PDF document text
    • https://764dfaed-7091-4b1c-a8ff-ceb5b694923f.filesusr.com/ugd/4bafdb_69e26abdfc5640ae81cc89b8ddf4c79f.pdf?index=trueIn PDF document text
    • http://siniligavaxuvul.onlinewebshop.net/99790274542.pdfIn PDF document text
    • http://tabonozekes.epizy.com/lazenukijukubuzopub.pdfIn PDF document text
    • http://gidozowelixije.rf.gd/korut.pdfIn PDF document text
    • http://geboxopok.rf.gd/a_christmas_carol_oxford_bookworms.pdfIn PDF document text
    • https://6f8cb219-4830-455d-9ced-b55e65700e85.filesusr.com/ugd/fd30ac_be10244a12f14853b1874aa5ef51135c.pdf?index=trueIn PDF document text
    • http://tituroxir.rf.gd/centripetal_and_centrifugal_forces_in_state_formation.pdfIn PDF document text
    • http://renunuxuxalebav.epizy.com/jac_10th_result_2016.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
    • https://goo.gl/6D1yowTorrenIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE759 5716 bytes
SHA-256: f932a505daa261eda1f27aefdbe0357e8ef8648f9cc064ee62e45500cf645dba
font_01_sfnt_off0000fac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC7 12808 bytes
SHA-256: b670e8f773be8a46a597cefbbf6d4937e7205eea1bcfc7a56bf3f66f872623b8

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