Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd742b8586bc1dc7…

MALICIOUS

PDF

81.3 KB Created: 2021-03-13 22:48:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: cc80baed90524e178d4f9f4cd94ba429 SHA-1: 4792b733af42808bc1800b8ed31a5ea6789351bd SHA-256: cd742b8586bc1dc7762ba9d0af3dbd11d615f16d56d988d5f642fac245c53768
194 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, 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 redirect users to malicious content. The document body, though obfuscated, contains text related to 'Anteprima panini 336 pdf', likely a lure to entice users to click on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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.
  • 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://bologen.ru/award?keyword=anteprima+panini+336+pdf PDF link annotation
    • https://cdn.sqhk.co/wexapitode/dhiiiSA/zodirizasikumewadoge.pdfIn PDF document text
    • https://votokivefanatu.weebly.com/uploads/1/3/1/4/131453133/fadaxesuvedat.pdfIn PDF document text
    • http://fimozagori.iblogger.org/tv_guide_nfl_games_today.pdfIn PDF document text
    • https://cdn.sqhk.co/jadilogivusa/g8oWq7f/8782065087.pdfIn PDF document text
    • http://rajukilodagoje.mygamesonline.org/whirlpool_front_loader_washing_machine_parts.pdfIn PDF document text
    • https://cdn.sqhk.co/felolavap/nhhWjed/31615892083.pdfIn PDF document text
    • https://cdn.sqhk.co/gusiloxi/gc9gehj/20381154745.pdfIn PDF document text
    • https://cdn.sqhk.co/gitopedevid/jhjhdhi/sword_of_shadows_series.pdfIn PDF document text
    • https://sivubatololux.weebly.com/uploads/1/3/4/8/134850937/3174479.pdfIn PDF document text
    • https://xivibexewodexaz.weebly.com/uploads/1/3/1/3/131397964/fogebesija.pdfIn PDF document text
    • http://tusiteguluvora.getenjoyment.net/zazixujaniwilup.pdfIn PDF document text
    • https://wodanosivowifig.weebly.com/uploads/1/3/4/5/134593279/tevozopuwigimat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://29aa9d28-cc9d-45fc-8d86-3718b5881c84.filesusr.com/ugd/74c34a_1aa89ccd3b0e48b3a3ab43b96506a7a2.pdf?index=trueIn PDF document text
    • https://51fd5013-30c4-43d1-89ce-86564632a3b5.filesusr.com/ugd/9f06f8_2ac033f3e73142ebba987dbd6f0e1893.pdf?index=trueIn PDF document text
    • https://4ac36a2f-1533-488b-b282-cf34cdace458.filesusr.com/ugd/bcfc12_4d68d78e98ec49ea9598e0fdc6867f43.pdf?index=trueIn PDF document text
    • https://76f5a3e5-08d8-4581-9975-6c1b933a1845.filesusr.com/ugd/dbbd16_4ade44add549405fb9d7968cdbf5ab06.pdf?index=trueIn PDF document text
    • https://e25b5f36-ee09-4010-8803-019b2853a23b.filesusr.com/ugd/c34eac_8a01e54dbc19490f9d98815dce16eade.pdf?index=trueIn PDF document text
    • https://fed4949e-3809-4fc0-a28b-84c5d390f589.filesusr.com/ugd/94482e_f4045aa4c4894f939f92d0b7361e144b.pdf?index=trueIn PDF document text
    • https://044e8d80-c429-4a1f-820d-9b443c65b389.filesusr.com/ugd/53c654_3e7bc19d71e24c86b5d008eda22444b9.pdf?index=trueIn PDF document text
    • http://jexibejeses.epizy.com/cathleen_ni_houlihan_text.pdfIn PDF document text
    • https://f495c71d-628d-4070-9a3d-b699cbb46ba4.filesusr.com/ugd/d99ef3_ef5e386141fd46d39acc36d64f32ebaf.pdf?index=trueIn PDF document text
    • http://kagokonutuvep.epizy.com/23346643095.pdfIn PDF document text
    • https://bc5ba30c-e427-49eb-abc4-9677f18f04c1.filesusr.com/ugd/bcd086_656d2980b31e4fb6b3114ffb493cc396.pdf?index=trueIn PDF document text
    • http://ronarag.epizy.com/particle_physics_lab_equipment_list.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_off0000eb07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB07 5284 bytes
SHA-256: af6ff05eb6b401d8bfe817428a48db39a1a5984246d87debb693d5434ee10908
font_01_sfnt_off0000fce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE7 11096 bytes
SHA-256: 51cf8122afb4e0a8ea082846920b294c255cadc2571bd027722658466b65520e
font_02_sfnt_off000122cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122CC 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7

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