Malicious PDF — malware analysis report

Static analysis result for SHA-256 6037250ea83ab8f2…

MALICIOUS

PDF

85.5 KB Created: 2021-03-12 07:20:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 4d78d351557023cbe604d29e5faaec0a SHA-1: 337502dddea9330fc9f39fdd647169bdad28c80d SHA-256: 6037250ea83ab8f2518dfdde919d9cda5bd923546207cca3787b4c6fa45a5b50
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with the primary URL pointing to a suspicious domain. ClamAV and ML classifiers also flagged this file as malicious, specifically as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and extensive URL usage suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery.

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://zajinet.ru/award?keyword=approximating+irrational+numbers+pdf PDF link annotation
    • http://xomunuxeju.sportsontheweb.net/85495863779.pdfIn PDF document text
    • https://jazedase.weebly.com/uploads/1/3/3/9/133997310/12063cabc5c449.pdfIn PDF document text
    • https://fukorolavo.weebly.com/uploads/1/3/4/6/134639224/fekelewezumelan_xejujajudaside_xubujapu.pdfIn PDF document text
    • http://gavediteriremuv.medianewsonline.com/3479871416.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/77893037613.pdfIn PDF document text
    • https://vokanuxuvewelar.weebly.com/uploads/1/3/4/6/134618840/8f667a9e1c1704f.pdfIn PDF document text
    • http://fejukoturig.medianewsonline.com/how_to_set_sony_icf-c1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/46588286517.pdfIn PDF document text
    • http://zubiluwetij.myartsonline.com/najaged.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/gexafana.pdfIn PDF document text
    • https://0502d5d0-a0f5-47b8-bc1c-644c46e4e431.filesusr.com/ugd/6cabbb_3374942b5b1e4e998b8e0bfd2ad77ec7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/miduko.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/bamavaliw.pdfIn PDF document text
    • http://totuxivez.onlinewebshop.net/free_crochet_virus_shawl_pattern.pdfIn PDF document text
    • http://bodegifu.atwebpages.com/78590091868.pdfIn PDF document text
    • https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_fe227834be11476aa8639eed57f4ad83.pdf?index=trueIn PDF document text
    • https://acd80754-3b70-42c6-a60f-3489f6261da4.filesusr.com/ugd/f1780b_812d7386abff4e78bf43657ca6d99b77.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/89395878268.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/heat_and_mass_transfer_cengel_2nd_edition_solution_manual_download.pdfIn PDF document text
    • http://netomadutimafe.onlinewebshop.net/91066284805.pdfIn PDF document text
    • http://tiluxusimutine.atwebpages.com/q_es_un_liderazgo_democrtico.pdfIn PDF document text
    • https://40785fcd-1e5e-4316-9306-5db1d5795eae.filesusr.com/ugd/2f07a1_3722e693c232423db5c48944c660583d.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10187 5440 bytes
SHA-256: 015f712e96d5120317a4dacad43e1972dc6f3465e245cdf351f6116c9532e77d
font_01_sfnt_off000113e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E7 11404 bytes
SHA-256: 527c58f971fc2f73fa825ddc6075160989c55772ad6fa2872260836f2d34f31e
font_02_sfnt_off000139d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139D3 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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