Malicious PDF — malware analysis report

Static analysis result for SHA-256 a92972572398be61…

MALICIOUS

PDF

77.7 KB Created: 2021-03-12 06:59:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 637d6b572357132e3908c8c46b510d66 SHA-1: 22fd7a43a5adae0d5a9f143aee1c00c0ed867f15 SHA-256: a92972572398be619cf128880a6101daf84e2552029a0985e58da315cfbbdf56
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are designed to mimic SEO-optimized content. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a phishing or spam campaign. The ML classifier and ClamAV detection further confirm the malicious nature of the file, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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://fokemale.ru/123?utm_term=study+adda+app PDF link annotation
    • https://cdn.sqhk.co/wumerelup/KhfHMWG/exploration_mtg_borderless.pdfIn PDF document text
    • https://tofariviviri.weebly.com/uploads/1/3/4/1/134109347/daragaz.pdfIn PDF document text
    • https://cdn.sqhk.co/pixefavenar/eXBtSWz/39657909990.pdfIn PDF document text
    • https://cdn.sqhk.co/lekusovu/A6jaRX3/57729154211.pdfIn PDF document text
    • https://notefusiwedamap.weebly.com/uploads/1/3/4/8/134872173/vavonibuvitodu-butebanuvifo-ziwisuteta-xijufuwubevite.pdfIn PDF document text
    • https://cdn.sqhk.co/niminililez/ieB1jjw/daily_in_custody_report_franklin_county.pdfIn PDF document text
    • https://cdn.sqhk.co/lamijaluxeso/i7c1lhj/wivanuxemejo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://noporotosodapo.epizy.com/vishnu_sahasranama_namavali_in_tamil_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/easy_things_to_paint_for_boyfriend.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eec4e066-8229-4e87-b5dc-50b287961b3e/how_to_pair_2020_freightliner_bluetooth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5011a846-cbfc-43e2-b535-ec997132fd0a/46418618730.pdfIn PDF document text
    • http://sedoguzod.rf.gd/79773981881.pdfIn PDF document text
    • http://zaravugudag.rf.gd/zebra_gk420d_how_to_reset.pdfIn PDF document text
    • http://pajinofemi.epizy.com/13065351594.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea2bbfa5-f6c9-408a-a0dc-8b96df3b9060/mukenigudixosewogivaden.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/dear_bully_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a60f121-5543-4f73-b3c2-34bfb728a11a/what_jobs_are_good_for_infj.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/install_burp_certificate_android_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/185e0b0a-2648-4779-832e-46df29fbff82/xetal.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/flyer_design_template_ai.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/how_many_calories_in_a_turmeric_latte_with_oat_milk.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/22227014113.pdfIn PDF document text
    • http://vomovawesojuti.epizy.com/77090088570.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/16742104239.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_off0000f3fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FE 4852 bytes
SHA-256: 5b3168760ee447fb5915280fe3f8683194e5c3cecd012bb57e736941ee72ee28
font_01_sfnt_off000104a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A0 10956 bytes
SHA-256: dc2ec374eff59a4076857ba7464eac3ee7285641f1e185d7d4b7cf259fedb620

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