Malicious PDF — malware analysis report

Static analysis result for SHA-256 d68ec80635ab3296…

MALICIOUS

PDF

77.3 KB Created: 2021-04-06 20:54:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 5ddaf30b5e157c0c9410a99a8ca7e19d SHA-1: 4538706eda2566a6752a22b8261192f50f54ea4c SHA-256: d68ec80635ab329617adc9cd4d7b6cb2763adf0d614f49437f1cfe1bcab873c4
134 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, with a notable one pointing to 'resalured.ru', suggesting a redirection or download attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm on disposable hosting, reinforcing the phishing or malicious download lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://resalured.ru/123?utm_term=musica+de+cabe%25C3%25A7udo+impala PDF link annotation
    • https://cdn.sqhk.co/domuzusud/gvJhabY/full_form_of_pok_in_gujarati.pdfIn PDF document text
    • https://pagowabelada.weebly.com/uploads/1/3/0/8/130874520/robezijisegija_betiju_najiviwegitito_gifogulokap.pdfIn PDF document text
    • http://pofubodegi.iblogger.org/yamaha_rx-a720_specs.pdfIn PDF document text
    • http://instacopyrighthelpteam.com/boundaries_in_dating_workbookormta.pdfIn PDF document text
    • https://cdn.sqhk.co/rotuzuwibi/ZRjfjg7/hairstyles_for_short_wavy_hair_male.pdfIn PDF document text
    • https://cdn.sqhk.co/guzoladip/pKiibhc/noirmont_jura_suisse.pdfIn PDF document text
    • https://kevititexozasen.weebly.com/uploads/1/3/2/7/132712545/xujenumim-daxubosop-tuxutetalovoma.pdfIn PDF document text
    • http://help-copyrightviolationhelpcenter.com/how_many_episodes_in_the_mini_series_defending_jacobwl4lv.pdfIn PDF document text
    • https://cdn.sqhk.co/betewulo/phhIha8/bepusuw.pdfIn PDF document text
    • https://guwubujurod.weebly.com/uploads/1/3/1/4/131438509/guxije.pdfIn PDF document text
    • http://jurelireroxux.22web.org/47798818925.pdfIn PDF document text
    • https://cdn.sqhk.co/roxigeve/N0The70/booyah_meaning_in_tamil.pdfIn PDF document text
    • http://checkmycredit.info/reluddovr2.pdfIn PDF document text
    • https://nesefutuderixu.weebly.com/uploads/1/3/2/7/132740375/japewafozot-sibaxuwane-xinajuvazanov.pdfIn PDF document text
    • https://xuwapitevakud.weebly.com/uploads/1/3/2/6/132682402/tejizuku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/2cf6b0b5-bd08-4432-af08-559984ef2fca/how_to_write_about_overcoming_obstacles.pdfIn PDF document text
    • http://runodeb.rf.gd/barashada_english_af_somali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1af5d7ea-4dba-4fa4-b476-1be63fb8200b/ravamijolis.pdfIn PDF document text
    • https://6f0a4cb5-9dca-4919-8d1f-05cba15fa13e.filesusr.com/ugd/d55797_22009ddf4ca94d30b5bde9f041d4beef.pdf?index=trueIn PDF document text
    • http://gajutovowitexij.rf.gd/bose_companion_20_specifications.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58774144-b3fe-4693-bf55-1eac2d3fec17/wavozekuzamar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f42a28f4-dff5-4362-9828-bc620f39fd0b/the_book_of_life_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1a1012f-14b3-4cc7-9c35-4fc12ad29377/68363144403.pdfIn PDF document text
    • https://72858ab8-d36f-4bc2-b208-e5ec56e76d01.filesusr.com/ugd/3a4e0e_458ed2fc8ff44b65ab3a13fae5e0d930.pdf?index=trueIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000caea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAEA 5148 bytes
SHA-256: 42d75c005bc99281dbe9b95457dffd55d5e652e0e45cb8d56c1c6279a2c7c8e5
font_01_sfnt_off0000dc1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1A 12048 bytes
SHA-256: 72e1794778fd5ee21b984d0a2f7b2d2542826e59213a1113aa04bdd47c6c588f
font_02_sfnt_off000102b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B8 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848
font_03_sfnt_off00011780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11780 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333