Malicious PDF — malware analysis report

Static analysis result for SHA-256 d347f076fa6d41fb…

MALICIOUS

PDF

91.2 KB Created: 2021-04-08 03:23:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 73d73674b8d7fbfd248fca342070ab7d SHA-1: 11387de283dddd80172658c58ec891060493471e SHA-256: d347f076fa6d41fbc67cde10bb76dee2aeca90de892b50e303e3a72eaf288bb0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • 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 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://baarspo.ru/strik?utm_term=best+picture+settings+for+samsung+4k+tv+7100 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425929/normal_605c07c7ab7bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387581/normal_6057057d1c833.pdfIn PDF document text
    • http://famesodelazij.22web.org/xesudalenew.pdfIn PDF document text
    • http://matawobedopikam.mywebcommunity.org/wolawewadutite.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417123/normal_5fdfc803bb53c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415929/normal_5fe853823aac5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469626/normal_600956eaaff48.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/digitech_gnx3_review.pdfIn PDF document text
    • http://goladelexugezi.sportsontheweb.net/treatment_of_prostate_cancer.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
    • http://ferodokibaw.epizy.com/cornelius_weather_report.pdfIn PDF document text
    • http://relobipisibigug.rf.gd/50584698.pdfIn PDF document text
    • http://sonowodiguvab.epizy.com/eclipse_c_format_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93a716d4-4d27-4135-9522-6f8cd68c0bf6/83783139366.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/178ba14b-baa0-46d6-b706-8116a6f87eda/how_do_you_set_a_defiant_timer.pdfIn PDF document text
    • http://ronogaso.rf.gd/ejercicios_de_estadistica_3_eso_doc.pdfIn PDF document text
    • http://tevefetilojas.atwebpages.com/cursive_alphabet_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e698a1de-18eb-4ffa-a4be-a4bd8f437b85/92034555805.pdfIn PDF document text
    • http://tufuripisaren.epizy.com/jijil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96e3f59c-a847-4198-a2f8-29f6aa29ef56/31137165711.pdfIn PDF document text
    • http://todakule.rf.gd/ocarina_of_time_switch_amiibo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2833183-f06e-4823-b11b-5749769c0039/62585317886.pdfIn PDF document text
    • http://gozukuga.epizy.com/animal_cell_and_tissue_culture.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47b7a2a0-ee8f-46a9-b02b-49ab8c8ea39a/nespresso_lattissima_pro_instruction_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39f2fcd7-f35c-434c-b613-9d1c5f6e588e/konakenewedavojifibusotad.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116A1 5720 bytes
SHA-256: e149c175f4c79181414afa80eaa655e464aac212f0d394eb88d91f992620973f
font_01_sfnt_off00012a22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A22 10760 bytes
SHA-256: 5ff5f046c1dde22bce9773ef17d7183e26283392dc383a99ae8b4f80e011127f
font_02_sfnt_off00014ecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14ECC 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34