Malicious PDF — malware analysis report

Static analysis result for SHA-256 be088dd2705ba71f…

MALICIOUS

PDF

72.6 KB Created: 2021-03-04 16:28:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 204f70ec5932a074720d0ee8f5bc0b12 SHA-1: 4d7945a565787ce06f1fd71550a9de66d7cdb8c7 SHA-256: be088dd2705ba71fdfa13747b6276275079b8a2f6c7af0149338800a78276fea
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, appears to contain text related to guitar chords, potentially as a lure. The presence of multiple external URIs suggests an attempt to redirect the user to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://mezovuduw.ru/123?utm_term=kneel+at+the+cross+guitar+chords PDF link annotation
    • https://cdn.sqhk.co/zebenane/iihfeje/wasazutilevitoz.pdfIn PDF document text
    • https://cdn.sqhk.co/fatobaliv/gghdgyr/cool_american_boy_names_2020.pdfIn PDF document text
    • http://biwiroxefamir.mywebcommunity.org/56863763757.pdfIn PDF document text
    • http://effektzhizni.ru/phoenix_os_remix_os_alternativefy8sn.pdfIn PDF document text
    • http://pejazadajenatew.getenjoyment.net/how_to_think_about_weird_things_8th_edition.pdfIn PDF document text
    • http://lnstagramverifiedbadge-media.com/bagadisotopokabumafemuda2la3l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420939/normal_601399e8b48a8.pdfIn PDF document text
    • http://fazejajogavu.medianewsonline.com/how_long_will_an_ecg_take.pdfIn PDF document text
    • http://retamos.mygamesonline.org/2591772472.pdfIn PDF document text
    • http://aov.one/ultrasound_guided_aspiration_seroma_cpt_codexwhfz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451035/normal_5ff8ed783dfa4.pdfIn PDF document text
    • http://ketosimple.online/tree_of_life_utah_desertwboma.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477155/normal_60251b2f62cc0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381101/normal_5ff4847b49da1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391907/normal_602378ba2eaba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/how_to_build_a_micro_bat_box.pdfIn PDF document text
    • https://0940f68a-d1f4-4b3c-b2e9-854edb90c9e5.filesusr.com/ugd/2d797c_d587e85aa45141459240b2ffa3206b6a.pdf?index=trueIn PDF document text
    • https://1b3fde16-7575-45ba-b40e-8916c64185ca.filesusr.com/ugd/8874e8_f98304353db64b0ea43367a9ab73c005.pdf?index=trueIn PDF document text
    • https://d45380bd-a93d-4ef2-b2bd-4c7806d1f6db.filesusr.com/ugd/5d2cf3_519548c2c08f4e0e8adfa269be68b30b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/seniboduja.pdfIn PDF document text
    • https://52468903-0e2d-47c5-babb-61e1d305d291.filesusr.com/ugd/32777b_2f1031571b4044f29bc355213c50ce31.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/befidafal.pdfIn PDF document text
    • http://bugenerefajujus.atwebpages.com/the_passionate_shepherd_to_his_love_explanation.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/able_birthday_invitations_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/mobogenie_app_for_android_phone.pdfIn PDF document text
    • https://5c2df1de-05ea-4e17-9aa3-38adc7ce3153.filesusr.com/ugd/ddd609_7cc041df98cd4edea9d85f8930b3e056.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC1 5172 bytes
SHA-256: 2b3daea9392a6212a56a51f0a87d2944e9d61dc68bc2795c804a891d50a63579
font_01_sfnt_off0000ee50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE50 11612 bytes
SHA-256: 1d5985274b67e82d7af2b1ec4ff3194064d5cb0808762b1b17adbed003dc283f