Malicious PDF — malware analysis report

Static analysis result for SHA-256 e26c9fce46b43850…

MALICIOUS

PDF

84.4 KB Created: 2021-04-04 11:54:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5c4ebd3f9724c1ee855f92adec038e54 SHA-1: 42bd37c3b9afea0aa607dc2e0a53bfbc3470d298 SHA-256: e26c9fce46b43850d8571ba27761178edf7ae7140987ce049805acdd99c01aca
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The presence of embedded URLs and the nature of the link farm suggest an attempt to lure users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dugedepap.ru/wix?keyword=0.15.0+minecraft+pe+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371010/normal_5fdc4ea040e54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475987/normal_60650d0d7125a.pdfIn PDF document text
    • https://welaxulisura.weebly.com/uploads/1/3/4/0/134042468/lalubigozuwad_gowudiwabe_nefuzopa_xiwoni.pdfIn PDF document text
    • https://birivisixakaxe.weebly.com/uploads/1/3/4/6/134608058/ad1f301c47.pdfIn PDF document text
    • https://bosogafowobalo.weebly.com/uploads/1/3/4/6/134614472/55366b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408323/normal_600c0061799e9.pdfIn PDF document text
    • https://gazufapojekivu.weebly.com/uploads/1/3/4/8/134890592/ca820791e.pdfIn PDF document text
    • https://japatuxivavagax.weebly.com/uploads/1/3/0/7/130775167/levedimezorujetodo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529697/normal_60430911bbfd0.pdfIn PDF document text
    • https://xabetidadema.weebly.com/uploads/1/3/1/3/131398123/rabox.pdfIn PDF document text
    • https://mirovufi.weebly.com/uploads/1/3/5/9/135958785/24ccc809dff2.pdfIn PDF document text
    • https://vazanopika.weebly.com/uploads/1/3/4/8/134896022/zefejigusalil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379043/normal_5fe6085575654.pdfIn PDF document text
    • http://dovejeve.22web.org/48977586379.pdfIn PDF document text
    • https://vitekasawo.weebly.com/uploads/1/3/4/4/134456264/pixubosepipil_lonijofejalem_binuxagoro_loluvese.pdfIn PDF document text
    • https://milakixu.weebly.com/uploads/1/3/1/4/131483020/397134.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://soxupagab.epizy.com/musical_acoustics_hall.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1aaebb3-2791-4c39-84c8-3ac398276d3e/11398162237.pdfIn PDF document text
    • http://wugorasu.rf.gd/tavuluvabozat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bf42ff4-e960-45cf-add8-1838cdee5942/examples_of_literary_devices_in_i_have_a_dream_speech.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1671b0f1-ae0e-4c48-8110-78ba9eb09599/celebrate_recovery_step_study_book_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c735cd24-36b9-480c-b7d9-5fb6eca939da/super_frog_saves_tokyo_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5c36857-ec2d-43c6-bcc3-5aa8cf4c3750/28807365439.pdfIn PDF document text
    • http://tadezaxe.rf.gd/keduzagewewor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59ebbe5a-31fc-4c2c-9a81-1663229be391/generic_audio_driver_for_windows_10_64_bit_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d1ad305-9720-4baa-a201-ac81d1fe311d/nilazuradufusuxul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89bac259-99d2-4fb2-99bf-11eea65d1b97/how_much_are_repairs_at_the_repair_shop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad743378-89d5-47f1-a7a2-d2c3854d06f8/30120435016.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://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_off0000f7a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A6 5272 bytes
SHA-256: 2643a2b56a76a911724a38ad88e867c556ae227a44828965187265e980f333fb
font_01_sfnt_off00010990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10990 11344 bytes
SHA-256: f051a09933b6698a7e1365f43794ff3b623bc6e6a5bef540b79ae862d0ec609c
font_02_sfnt_off00012f9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F9F 16164 bytes
SHA-256: f469c5aa689aa4c1965481b78cfaebbf1c3ebdad2306c7067134b7b4aaa0addd