Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5572bf4fa89a6b2…

MALICIOUS

PDF

70.0 KB Created: 2021-03-28 21:16:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c1ec20d09fd37a5c40f7472f5de4946d SHA-1: 5638a1ca0b94ff2fdc836ef83344d50810aa767a SHA-256: a5572bf4fa89a6b200c6bf9f60ac02aef071dd571a9fd9a41e79ad6aa911c712
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malware or conduct phishing. The heuristic 'PDF_SEO_LINK_FARM' specifically points to a mass of external PDF links, with one example being http://ropugefax.epizy.com/burger_king_gutscheine_2020_oktober.pdf, indicating a coordinated effort to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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://fokemale.ru/wix?keyword=boiling+springs+library+jobs PDF link annotation
    • http://steelsho3.club/goldman_sachs_guide_to_watchesux3bi.pdfIn PDF document text
    • http://donuliwobem.iblogger.org/misubeginurutunebiteku.pdfIn PDF document text
    • https://tagopebarezixog.weebly.com/uploads/1/3/1/6/131607889/givakubudixepi-fudodoz-negutimik-fimimeg.pdfIn PDF document text
    • https://neveloso.weebly.com/uploads/1/3/1/4/131408616/gadaganez_bigasiwunokib_sajasazoniwum.pdfIn PDF document text
    • http://idealica-italiaufficiale.website/ligiw22qq8.pdfIn PDF document text
    • http://zhigina.ru/persuasive_writing_prompt_middle_schoolvqaz4.pdfIn PDF document text
    • https://cdn.sqhk.co/jawuraxexije/dhfoJha/learn_to_play_piano_on_midi_keyboard.pdfIn PDF document text
    • https://wipemaxo.weebly.com/uploads/1/3/5/3/135345075/vozavebotegamexuv.pdfIn PDF document text
    • https://pagejenaxupiwig.weebly.com/uploads/1/3/4/3/134383440/2638751.pdfIn PDF document text
    • https://sefokasezasun.weebly.com/uploads/1/3/4/6/134690402/aa29c95a604fd.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/QkKLwhd/frontline_attack_war_over_europe_serial_number.pdfIn PDF document text
    • https://cdn.sqhk.co/bitajububida/ijbiagf/tutorial_edit_lightroom_cc_ala_selebgram.pdfIn PDF document text
    • http://ogranicbio.space/mi_home_security_camera_360_manuale_italiano0s7ta.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ropugefax.epizy.com/burger_king_gutscheine_2020_oktober.pdfIn PDF document text
    • https://33fe1336-4051-433c-b691-b763732126dd.filesusr.com/ugd/6c8f37_8ed0977cb4324684957ff5453a3c75d5.pdf?index=trueIn PDF document text
    • https://ae0ecf71-49bb-4ac4-bba4-d0f2a20d1af9.filesusr.com/ugd/668a47_e22ee9af7138466fbbf5cb6d9cda78c2.pdf?index=trueIn PDF document text
    • https://fb413987-6e77-4bf1-aaa6-e97eb550fbee.filesusr.com/ugd/108936_924ced01aff3488ca5543781330224a4.pdf?index=trueIn PDF document text
    • https://2a085669-a8dc-40eb-b1d3-71ea9d660f60.filesusr.com/ugd/cafc24_fb0837a92243442595cdfb5540b72f9d.pdf?index=trueIn PDF document text
    • http://zenowalu.rf.gd/maadhaar_app_for_jio_phone.pdfIn PDF document text
    • https://c01188fd-d8af-4b86-846b-090f7ecd58d8.filesusr.com/ugd/9058e5_cfbdedf138dd419bb182b11b45830a52.pdf?index=trueIn PDF document text
    • https://9e2b3e3a-6a02-4d3b-8ba9-5acc01041672.filesusr.com/ugd/66c878_cc868a58d8434f0a905587ee140626a3.pdf?index=trueIn PDF document text
    • http://wapudeximevaw.rf.gd/29886574757.pdfIn PDF document text
    • http://lakugarim.rf.gd/incoterms_camara_de_comercio_internacional.pdfIn PDF document text
    • https://c31d65df-273c-4bcc-acfb-7b03b0724b99.filesusr.com/ugd/e7e4a0_cd5cb24897e04251b1f5c0cf265c78a9.pdf?index=trueIn PDF document text
    • https://dacf5b84-f80e-4bd8-bb7f-22aad20a1cd8.filesusr.com/ugd/285be4_60cc8f804bd3416f86aebf34684ba3e4.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_off0000d53b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD53B 5352 bytes
SHA-256: ebdb31b52081685a9bdebc4e36d5d2744d26262943fca01445651d93f3d8ea22
font_01_sfnt_off0000e78e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78E 9692 bytes
SHA-256: e71e3384f270eac25af02429361a539ddd77afe5fb221edb5f4dc041826bfc95

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