Malicious PDF — malware analysis report

Static analysis result for SHA-256 44ffc98e280fc596…

MALICIOUS

PDF

77.3 KB Created: 2021-03-08 17:00:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f6f66cbbd2499792b157ca19319b2f9 SHA-1: 47e96287040a0136d7ac3128e64265ba1dcb88d9 SHA-256: 44ffc98e280fc5964ad3076791a1111699b83651e47c44e1c94662270fe0339d
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by a machine learning classifier and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into visiting a malicious site for information or support. The document body, though heavily obfuscated, contains references to 'Lennox slp98uh error codes', suggesting a lure related to product support.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/aws?utm_term=lennox+slp98uh+error+codes
    • https://cdn.sqhk.co/pixazizaze/dhgKEjf/the_historical_atlas_of_world_war_ii.pdf
    • https://cdn.sqhk.co/sunawopi/JjejhnX/setepifolixirugurazi.pdf
    • https://witokilufixag.weebly.com/uploads/1/3/4/7/134739393/kojeximexil.pdf
    • https://bobefadapuxat.weebly.com/uploads/1/3/4/8/134858353/60227ed.pdf
    • http://siwupezomejen.getenjoyment.net/beats_studio_3_wireless_blinking_white_light.pdf
    • https://cdn.sqhk.co/delotijuw/jggggh2/good_skins_for_minecraft_pe_para_descargar.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ca483b97-61ac-4196-bca0-6b249c18eca9.filesusr.com/ugd/b27199_b3722da32dcc4dc099ec8c3a3d661da8.pdf?index=true
    • https://s3.amazonaws.com/rewepalazamiso/80532722960.pdf
    • http://bivojeda.atwebpages.com/nakupapofunilofirijebuzoj.pdf
    • https://uploads.strikinglycdn.com/files/8234699f-3c55-41e2-aa43-409ed5cdee5f/81459143299.pdf
    • https://45f91bdd-2b68-4e60-ae2c-b14373ae5332.filesusr.com/ugd/0d089b_9c1ee358ef424f95ac56b371864fb301.pdf?index=true
    • https://uploads.strikinglycdn.com/files/18f58f4b-6eaf-41b1-8bb0-e96950311f8d/zuvisek.pdf
    • https://s3.amazonaws.com/kuboki/bebadigav.pdf
    • https://uploads.strikinglycdn.com/files/55e74308-e458-4a41-9f2d-c951bc3a4000/tiwolila.pdf
    • https://s3.amazonaws.com/woxotopapozokev/mugusipuwoxogogexuwegozu.pdf
    • https://uploads.strikinglycdn.com/files/a6dd2ee1-f3c4-4752-8608-cdca00c4409f/69721029493.pdf
    • https://uploads.strikinglycdn.com/files/46062da7-b066-4b9c-8a47-dba6d33fee91/dsc_pc1832_installer_code.pdf
    • https://c84ffda1-e72a-45fa-8ce8-a771970cf326.filesusr.com/ugd/9fd656_f736c0cc4fc7475e973027980af0515b.pdf?index=true
    • https://s3.amazonaws.com/xubifupi/zosajofabidisejeze.pdf
    • https://s3.amazonaws.com/penefelomiju/formative_appraisal_business_definition.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f338.bin
4808e34e7886a96cd65d1e43d47eba6e3897023345273dd46e221f7e998ccaef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF338 5312 bytes
font_01_sfnt_off0001054c.bin
e7488fed58a514f19121a616bcb91e5dca67e50b2875fd3cdd254f02a7d7204b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1054C 10216 bytes

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