Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0d5f6fdfa989e3b…

MALICIOUS

PDF

110.3 KB Created: 2021-03-13 17:17:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 4eefcc0dae65f3d174f7dc15e577dc3d SHA-1: fd5b8120e28f2c55437e2c9c1be44c7bc283dada SHA-256: a0d5f6fdfa989e3bccb83737848b692aa076f0f64b82a6306abaf0eee4b3cac1
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to PDF files, suggesting a link farm or SEO spamming operation. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically a phishing or trojan. The embedded URL points to a suspicious domain, likely serving a malicious payload or redirecting to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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 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.
  • 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://zajinet.ru/strik?utm_term=drinkwell+mini+pet+water+fountain+manual PDF link annotation
    • https://wasaxedunup.weebly.com/uploads/1/3/1/4/131453111/gesotugirinesusa.pdfIn PDF document text
    • http://fasoxuxesatilu.sportsontheweb.net/facebook_business_model.pdfIn PDF document text
    • http://siwivelijutore.medianewsonline.com/ibps_guide_computer_capsule.pdfIn PDF document text
    • http://sinoxaju.mygamesonline.org/world_map_quiz_game_jetpunk.pdfIn PDF document text
    • http://fijubigatusurov.scienceontheweb.net/reparuzelosojidixomedela.pdfIn PDF document text
    • https://cdn.sqhk.co/lirerafi/ihrhgFm/93338151446.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxobenona/hzidAih/wild_frontier_game_wiki.pdfIn PDF document text
    • https://mabaxezo.weebly.com/uploads/1/3/4/7/134766945/ninegur_takamataj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365562/normal_60171684d5b96.pdfIn PDF document text
    • https://cdn.sqhk.co/jolodovi/ngfhjMt/50088892874.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379229/normal_5ff27d4ef332d.pdfIn PDF document text
    • https://cdn.sqhk.co/xaderipamuva/hbbejem/31670371057.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411944/normal_5fed7a0692e69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402706/normal_601e2d9539e48.pdfIn PDF document text
    • https://bilezebije.weebly.com/uploads/1/3/4/3/134344171/pajak-feragu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499636/normal_5fce206511cb9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/96061763170.pdfIn PDF document text
    • http://netomadutimafe.onlinewebshop.net/48999375958.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/hidden_cheating_apps_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/geometric_series_formula_example.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/legapetu.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/kimamuxevojomomik.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/71316771917.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/after_effects_title_sequence_templates_free.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/12607864945.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/kawakami_gift_guide_persona_5.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_off00015e54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E54 3688 bytes
SHA-256: 2994d402bcd43d1cc1206979d70f264f85748c63631c945f3399ab98a1cd7662
font_01_sfnt_off00016b96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B96 5024 bytes
SHA-256: 41a5fc7aea14c461f247b732e72b00f38ac611a5949af3b415cf2d187c5266f7
font_02_sfnt_off00017cb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CB4 15500 bytes
SHA-256: 6b375e0592c1f5804836c056bb20e7a8d19cf93a78a1ad5292b294f2640309b8

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