Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a47dfd8f59b4452…

MALICIOUS

PDF

75.8 KB Created: 2021-04-20 18:30:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 333bfbb81abcf6302314a2bc7a5be530 SHA-1: 66eb52f816bfce438042351af642df52fff25629 SHA-256: 5a47dfd8f59b4452699abb85245771c1bf39ac4958199f396d4975b98e44e8fa
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO link farms or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URL points to a suspicious domain, likely serving as a lure or part of a larger malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/strik?utm_term=what+is+equivalent+to+type+f+transmission+fluid PDF link annotation
    • http://fasoxuxesatilu.sportsontheweb.net/what_does_the_baptism_of_fire_feel_like.pdfIn PDF document text
    • http://giwosesupalu.medianewsonline.com/degikexo.pdfIn PDF document text
    • http://tinubawolu.mywebcommunity.org/69562009245.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/dapekufoxiraku/what_is_the_bible_to_us.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/jixijulojasop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/828c9335-4d07-479d-ac48-d77d203ad7b0/is_there_a_movie_called_the_stand.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36642633-4a39-466a-bff1-9d31fcc21f71/34954520521.pdfIn PDF document text
    • https://9b08d158-0e0f-4203-9b31-e1272d977b1c.filesusr.com/ugd/086daf_8fac737727594180a587824ba4df1ee6.pdf?index=trueIn PDF document text
    • https://c580675e-8888-491d-8c80-3106eaac86fb.filesusr.com/ugd/c8a981_d77f8b20a56c46a6a4a93b89f0546177.pdf?index=trueIn PDF document text
    • http://goxafebo.myartsonline.com/abecedario_con_imagenes_para_colorear_e_imprimir.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/kigukobeda.pdfIn PDF document text
    • http://binuwuzipu.myartsonline.com/44364640571.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/kenmore_coldspot_refrigerator_model_106_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/putting_words_in_alphabetical_order_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/sex_drugs_and_cocoa_puffs_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/best_android_phones_2018_in_kenya.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/apartment_lease_contract_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/42970406302.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/st_edwards_university_map.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/pubivoparenito.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c4edda2-f9c6-41ce-aad5-8af5acdcd8fe/1150593409.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27fc5645-cc89-4fb3-8882-33f420f67914/diy_log_splitter_plans.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB86 5584 bytes
SHA-256: 2e21256c96e642e38f364759ac44f9d35dd637b04395c0decef32bc1a90e16e1
font_01_sfnt_off0000fe6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6B 10216 bytes
SHA-256: 63b0c7b5b27f90124810b1f5de275f87cb54139aa2ce4cf1479948db0092fd00

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