Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bda36e9d229e1fc…

MALICIOUS

PDF

80.8 KB Created: 2021-03-09 17:26:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 631d608581b6edf2c0bed8e67bf4dc7b SHA-1: d7cae1602c589ef370d877872d45c50651db1de2 SHA-256: 2bda36e9d229e1fcda3aeb4869e68932a2a1b49b9d405f223bdbdffea694f071
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many hosted on disposable domains, which is characteristic of SEO link farms or phishing distribution. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The document body is heavily obfuscated and appears to be corrupted, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://ponafet.ru/strik?utm_term=paco+el+chato+historia+4+grado+pagina+34 PDF link annotation
    • http://terugate.mypressonline.com/2032467014.pdfIn PDF document text
    • https://jonomivebotuw.weebly.com/uploads/1/3/4/6/134683751/laxure.pdfIn PDF document text
    • https://famutogerene.weebly.com/uploads/1/3/4/6/134688643/newiwegukim.pdfIn PDF document text
    • https://laxigotugib.weebly.com/uploads/1/3/0/9/130969680/96110738c5211a8.pdfIn PDF document text
    • http://vetobiz.sportsontheweb.net/canada_steel_exports_to_us.pdfIn PDF document text
    • https://cdn.sqhk.co/kagumuzom/lOTyqjf/gun_ringtone_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xivumatozo/SRvJ5jb/ketuvoz.pdfIn PDF document text
    • http://tetiviguxawik.getenjoyment.net/dinosaur_yoga_cards_free_printables.pdfIn PDF document text
    • http://giwitap.getenjoyment.net/watuzuguzaren.pdfIn PDF document text
    • http://bajifepeselok.sportsontheweb.net/xurulukunis.pdfIn PDF document text
    • http://ziwewixowele.sportsontheweb.net/porisebukaf.pdfIn PDF document text
    • http://gesetaxoxu.sportsontheweb.net/best_friend_synonyms_in_french.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/112525d2-a14b-4b9e-a566-43a847cdfb3b/58011022877.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7feaf1bb-0325-46bb-84d6-379e37630f70/periwatenosazinitimule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d386baa-c458-4331-9462-a1ab5d82aa7e/wopisivifazuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c5c47fe-b46f-40ad-86fe-7a334c59fb39/modelo_de_certificado_de_inspeccion_tecnica_vehicular.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dcbb7a7-3150-4ac3-b39f-b82391670c81/canon_powershot_sx160_is_software_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4c60127-5f73-439a-96db-99163f195724/arduino_board_manager_error_downloading.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7907a88-ef3e-455a-8f3a-cda71dd90312/86749262981.pdfIn PDF document text
    • http://madigekole.onlinewebshop.net/cirque_du_freak_books_ranked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8109fd31-6881-4c0e-a76c-a2b09ab6af26/canon_mg3520_wireless_setup_to_laptop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e6c048b-b264-42ad-8f94-c9befa059111/how_hard_is_the_massachusetts_motorcycle_permit_test.pdfIn PDF document text
    • http://gajamozaxekega.atwebpages.com/xilexe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ccf4479-9fba-4b5d-a43f-c4cef1078874/how_to_make_a_humidor_out_of_a_cigar_box.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAD 5376 bytes
SHA-256: 914888e85be5194dff9a241ca754c2ba025f1ecd0425f783b8940d76d8c685c7
font_01_sfnt_off0000eee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE5 12164 bytes
SHA-256: 3331657691f435ef458ac378b521abaac2df9a32fe0cb145a4664b6fbdf39a2a
font_02_sfnt_off00011691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11691 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
font_03_sfnt_off00012453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12453 6068 bytes
SHA-256: ec2a1923b739af48de5a20e9b5796fd90a259d4dbb5fe52530e2577d8c18362a

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