Malicious PDF — malware analysis report

Static analysis result for SHA-256 a710c3d08279bd43…

MALICIOUS

PDF

89.5 KB Created: 2021-05-03 21:34:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 540ed5e49fb831128aa69a3364b8d463 SHA-1: ecbc74579c84a9840b49397f39e8b8dc89e6dfd3 SHA-256: a710c3d08279bd432f28a3fc870085eb07aa4d9d516757adb97e40373dd82977
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and exhibiting link farm characteristics, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a lure to external malicious content, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jacksth.ru/strik?utm_term=eheim+everyday+fish+feeder+petsmart PDF link annotation
    • http://pek-24.cc/ignou_blis_solved_assignment_free_2018-_19mn9ic.pdfIn PDF document text
    • http://fortuneo.best/mpandroidchart_pie_chart_examplelqohn.pdfIn PDF document text
    • https://podivupolubag.weebly.com/uploads/1/3/4/6/134633413/ladomajebosigafosuti.pdfIn PDF document text
    • http://sufawevugut.mywebcommunity.org/books_like_what_i_was_doing_while_you_were_breeding.pdfIn PDF document text
    • http://vamolufu.getenjoyment.net/27669152219.pdfIn PDF document text
    • http://mebel-albero.ru/how_to_write_an_apa_lab_reportbjhou.pdfIn PDF document text
    • http://ronumel.iblogger.org/allegro_pcb_tutorial.pdfIn PDF document text
    • https://kidamevu.weebly.com/uploads/1/3/1/4/131437276/2931975.pdfIn PDF document text
    • http://persequen.com/2013_civic_service_manual5bj1z.pdfIn PDF document text
    • http://winclean-shop.space/conditional_sentences_type_1_and_2_multiple_choice_exerciseszcdh4.pdfIn PDF document text
    • http://filemarker.store/9595211433532cif.pdfIn PDF document text
    • http://cmb-societe.com/ribuvegesisexibirh5d6l.pdfIn PDF document text
    • http://stickerrus.ru/8955762294iz4w1.pdfIn PDF document text
    • https://xidelesa.weebly.com/uploads/1/3/4/4/134498911/7a1ef9b.pdfIn PDF document text
    • http://lajijedevasure.iblogger.org/nuvazuporewilegekexawako.pdfIn PDF document text
    • http://muzhskoizhurnal.ru/povuluderuzotilivilarehmfm.pdfIn PDF document text
    • http://azorocheat5.xyz/how_to_cook_archer_farms_hickory_smoked_boneless_honey_ham8yfy4.pdfIn PDF document text
    • https://poxapoxidofex.weebly.com/uploads/1/3/4/0/134016688/383907.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zijurape.atwebpages.com/indesign_print_booklet_to.pdfIn PDF document text
    • http://jalijoruki.atwebpages.com/chaconne_piano_sheet.pdfIn PDF document text
    • http://vuxawov.rf.gd/suwubalajaxat.pdfIn PDF document text
    • http://vovakupalujum.onlinewebshop.net/highland_coffee_menu.pdfIn PDF document text
    • http://zisukuvi.atwebpages.com/business_environment.pdfIn PDF document text
    • http://rodisasedozax.myartsonline.com/plant_and_animal_cells_differences.pdfIn PDF document text
    • http://mekuletolazov.rf.gd/nuwotaw.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000121dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121DC 5368 bytes
SHA-256: 870e0078916818fa8f89e33d67ebb950a6e7bd62654f9cf49a77a3ab45fbf01c
font_01_sfnt_off00013407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13407 10712 bytes
SHA-256: ba02b4b2d5d2742ce648a45e1f943414b8815f101f37c30df7b2c466e6635b6d

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