Malicious PDF — malware analysis report

Static analysis result for SHA-256 548da2a483c8a2aa…

MALICIOUS

PDF

75.4 KB Created: 2021-03-25 08:17:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8dba0275a78f4ae28c5f584951b0babf SHA-1: b0c2168d17a3161e062a5941c5810035ffa7b780 SHA-256: 548da2a483c8a2aa69ccf89208845a540ecfac91acd8dcb172423458e149641f
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent URL, 'https://mezovuduw.ru/strik?utm_term=lock+pick+kits+for+sale', suggests a lure related to lock picking kits. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://mezovuduw.ru/strik?utm_term=lock+pick+kits+for+sale PDF link annotation
    • https://cdn.sqhk.co/lepudijazur/3ijdDia/voxikegononaxolidalasemiz.pdfIn PDF document text
    • http://fopokigife.mywebcommunity.org/mofawidunitakixe.pdfIn PDF document text
    • https://cdn.sqhk.co/tifapoxur/Fiehigc/drag_racing_cars_for_sale_in_north_carolina.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/xeponodij/fonufuzozipiwebezuguz.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/bosozovu.pdfIn PDF document text
    • https://75ca6b5e-a470-4e0e-8004-b00a9f1721b4.filesusr.com/ugd/1e4819_c19fed9ae7324ecab0060c3cac880ab0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/52002975610.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c67b4f2-96b2-4014-9379-7916f8811610/new_covid_death_numbers.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/20508235295.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/burekorixituna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ec38ccc-3d92-4e87-93a6-0f9802600c61/weedeater_featherlite_18cc_trimmer_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ca1d734-650a-48d3-b9a9-9e1437cfce86/juvimirevusonurab.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/ben_10_cartoon_free_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/timojonita.pdfIn PDF document text
    • http://solejow.myartsonline.com/jetaretaj.pdfIn PDF document text
    • https://ffcd7f67-9b43-45c2-8e44-b15cca9583b8.filesusr.com/ugd/48bf55_b9825e2bff744f1cb0b8a77835487422.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ca3163c-1c85-4dc7-8a56-707af2388c0e/what_does_ignition_lockout_fault_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/adobe_audition_free_latest_version.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/jazzy_select_14_xl_battery_replacement.pdfIn PDF document text
    • https://def05634-b969-4265-beeb-1e7d695e9a44.filesusr.com/ugd/6865ce_62c5186a6f354bcfa5ce70ea29d869f1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/439ebc7a-dc6b-4634-a966-de9df6ed77c0/fedezasilor.pdfIn PDF document text
    • https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_d1ff5388ce7a4f60b5ff269f98a22a97.pdf?index=trueIn 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_off0000e9da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DA 5016 bytes
SHA-256: efbea9352e59cf3e36c2f4b04ba46714dc4511cd23b51c221c61d79975c64e80
font_01_sfnt_off0000fb04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB04 10872 bytes
SHA-256: 0e3dee2ba22b8d9048a83083dc6209d39ad24f7e64fdf82446b58f52dba510e8

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