Malicious PDF — malware analysis report

Static analysis result for SHA-256 a282d96f5fbc0552…

MALICIOUS

PDF

87.1 KB Created: 2021-04-16 15:48:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: e472d9b9caae1933419bccd863b36ba6 SHA-1: 03878610cc4a881b3f917dc03ecfd7f6c013ce7c SHA-256: a282d96f5fbc0552b4be2d0a38e4340d27872bf5cbed2dc1368eb8abc0908772
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used in SEO link farms or phishing campaigns to drive traffic to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing or a trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://seumenha.ru/strik?utm_term=how+to+use+a+mind+map+for+revision PDF link annotation
    • https://suzoniku.weebly.com/uploads/1/3/4/4/134456843/9824877.pdfIn PDF document text
    • http://supobesopo.mygamesonline.org/principles_of_banking_and_finance_textbook.pdfIn PDF document text
    • https://wajupera.weebly.com/uploads/1/3/4/7/134763514/1576130.pdfIn PDF document text
    • http://sisogelodaze.medianewsonline.com/sirogapozenuvifazobu.pdfIn PDF document text
    • https://ginixogigifigat.weebly.com/uploads/1/3/4/3/134367444/3808269.pdfIn PDF document text
    • https://direwuberegenis.weebly.com/uploads/1/3/4/3/134361890/4782407.pdfIn PDF document text
    • http://punavuvipufov.sportsontheweb.net/how_does_the_last_book_of_the_after_series_end_of_life.pdfIn PDF document text
    • https://vegivuben.weebly.com/uploads/1/3/4/6/134660922/d5fda384af2c.pdfIn PDF document text
    • https://fomezesas.weebly.com/uploads/1/3/4/3/134343882/mevojalejobawoju.pdfIn PDF document text
    • https://bunogijadijis.weebly.com/uploads/1/3/4/8/134896562/vewanurodi_juberukes.pdfIn PDF document text
    • http://mesutilixuta.sportsontheweb.net/binomial_theorem_ncert_solutions_download.pdfIn PDF document text
    • https://wifusewaxoxuxi.weebly.com/uploads/1/3/4/4/134497844/96bcb645fce3.pdfIn PDF document text
    • https://revugegan.weebly.com/uploads/1/3/4/6/134682990/nutuwezibafab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fba08e88-ce38-4235-b1b3-79c3fa85f0de/how_are_the_organisms_classified.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adcbd4f1-7a1d-4e10-a93b-58c757eb89b9/how_do_i_activate_my_verizon_hotspot.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/synonyms_and_antonyms_with_urdu_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/certificato_di_conformit_laurea_medicina.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/zupajepemavepokak.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/what_are_the_characteristics_of_computer_memory_system.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/42790432739.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2af2f273-2ac2-48ef-ad51-6b260373d09a/canon_speedlite_580ex_ii_price_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/detufulidolanunuviku.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/67348353683.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f11bf78b-6b46-491b-91f0-2ac4ce86f0d2/98229219330.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/what_are_the_roles_and_responsibilities_of_a_barista.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af1dd770-a040-4e10-8963-ebaa757e5e73/wixepu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10202 5268 bytes
SHA-256: 542c6855d51edff16854b93685c9f732c05f8c33c2da936e991c09c009db525e
font_01_sfnt_off000113e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E8 10908 bytes
SHA-256: 61270f6e9c8d11d249967df59432bd32a4150ad73639d83231ab082034f8440e
font_02_sfnt_off0001396b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1396B 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501