Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f6172f2b41f6139…

MALICIOUS

PDF

106.1 KB Created: 2021-04-06 07:30:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 46cb3008c187c4a7a3169d66b21c6508 SHA-1: 5c1466b498e46c735279eb7180711cf5de712fd9 SHA-256: 1f6172f2b41f613915f73145993cecdcb08f131abe09e53d2df6d77613603638
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary external URIs points to 'https://druttle.ru/award?keyword=islamic+boi+pdf+bangla'. The ML classifier and ClamAV detection strongly indicate maliciousness, classifying it as a phishing or trojan PDF. No scripts were extracted, but the structure suggests an attempt to redirect users to potentially malicious or SEO-manipulated content.

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://druttle.ru/award?keyword=islamic+boi+pdf+bangla PDF link annotation
    • http://hustlinmoney.com/safe_agile_certification_sample_questionsdqja3.pdfIn PDF document text
    • http://support-copyrighthelpservice-about.com/mariage_d_amour_piano49ebf.pdfIn PDF document text
    • http://nncucuucuc.space/how_to_write_a_script_for_a_video_documentaryefcmq.pdfIn PDF document text
    • http://justamorem.com/46243673153dhn45.pdfIn PDF document text
    • http://superheatbelt.xyz/paid_time_off_upon_terminationxve39.pdfIn PDF document text
    • http://socialwave.me/rexifefesinun28rb.pdfIn PDF document text
    • http://topcreditcheck.info/94309302163obxly.pdfIn PDF document text
    • http://lorenbayi.com/mineral_spirits_vs_oil_of_turpentinewt8au.pdfIn PDF document text
    • https://lidekejim.weebly.com/uploads/1/3/4/3/134331166/ritojimabeluxari.pdfIn PDF document text
    • http://storezone.info/422068252579l9k1.pdfIn PDF document text
    • https://bimuxafidiw.weebly.com/uploads/1/3/4/7/134701061/morukisaseda-voloxamepusa.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/9ce53948-9f4a-4c4b-90aa-7a17bc50529e/biblia_de_estudio_macarthur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d782c681-b15b-49d2-8f9f-bf273f39c946/which_omega_masticating_juicer_is_the_best.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/leave_application_format_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/blood_pressure_machine_software.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/45557758520.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54244bba-4068-486b-bde2-f1b469146295/descriptive_writing_examples_grade_10.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/wonatekibif.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/38415365858.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/55836383337.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/animal_instinct_riddim_mix.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/baazaar_video_songs_2018.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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001214c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1214C 5456 bytes
SHA-256: 53676d856d47ee0a27c201588a7b97db5b86234b9f6bf4ba76d0e510f2d19974
font_01_sfnt_off000133ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133CA 23880 bytes
SHA-256: fcc332e50b8a53aa0f1e054181af9c8e2985964dfd431662220fd1b9360e90e1
font_02_sfnt_off000176b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176B2 10668 bytes
SHA-256: ffc2f2995d23e9ee8a44a5b489c3dbe030187767996c9edddfe46cf14dd10fba

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