Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0774d8ecea85f77…

MALICIOUS

PDF

71.1 KB Created: 2021-03-19 10:46:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: f4b1cdf0b1cf69b97f38102cafc3c1c8 SHA-1: 9992672911e37332b08a010a20c9ea1cdf0512b2 SHA-256: a0774d8ecea85f77729b399a778ba7fe1678bf78b1a248c5b6a378d04fe00344
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, suggesting a link farm or redirection tactic. The document body's deceptive content about puppy sales, combined with the numerous external links, indicates a phishing or scam attempt. No scripts were extracted, but the presence of external links suggests potential for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/strik?utm_term=mini+dachshunds+puppies+for+sale+near+me PDF link annotation
    • http://saxobupazes.sportsontheweb.net/xakifojevisigesa.pdfIn PDF document text
    • http://soluzixod.66ghz.com/enlace_quimico_unam.pdfIn PDF document text
    • http://jebifawulu.mywebcommunity.org/troy-bilt_mustang_22hp_42_in._zero_turn_mower.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/jirebonudur/el_mundo_de_sofia_pelicula_resumen_corto.pdfIn PDF document text
    • http://difesasud.epizy.com/how_long_should_i_leave_splat_hair_dye_in_my_hair.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/delegation_of_authority_matrix_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/7987929256.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/c_byte_array_to_string_performance.pdfIn PDF document text
    • http://jenepopavuse.epizy.com/blank_invoice_template_excel_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/kung_fu_panda_4_release_date_confirmed.pdfIn PDF document text
    • http://kobejabirof.rf.gd/55372173681.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f9c3e84-6a67-4fa3-a716-8397c37b84bf/balapataxuvolipukigojo.pdfIn PDF document text
    • http://xifetofaramil.rf.gd/ibm_qradar_7._3_administration_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45127570-073b-4b47-9611-9d5bb8bf846b/73304546091.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aafd67e-3d9d-4248-9e2a-4fa165562758/nj_residential_lease_renewal_form.pdfIn PDF document text
    • https://87b84290-c0b3-4c73-97a1-3d59c64c3f69.filesusr.com/ugd/c638b7_977b4745de7641df98e5560b82f8833c.pdf?index=trueIn PDF document text
    • https://5a1138df-423b-4a5d-a7c7-36223740754e.filesusr.com/ugd/a72fa8_13f694ff668148a7baf6c1d51d15c63b.pdf?index=trueIn PDF document text
    • http://teropisarazo.myartsonline.com/12358187921.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c8e4b72-d92f-4386-bb99-07b29ff0a00d/nagojeju.pdfIn PDF document text
    • http://putazosaw.epizy.com/gisuduwudasufikeke.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_off0000d887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD887 5400 bytes
SHA-256: b6485e045b1361429327d8d4a1104ec035e5c57d3f73e410f8185f02779bdbdc
font_01_sfnt_off0000eac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC5 10512 bytes
SHA-256: 8ad9d53f1da46be183b023a0e7750c317900c8b52448cdc6810ce20fe75ad899

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