Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1e11a06b390a857…

MALICIOUS

PDF

79.2 KB Created: 2021-05-31 21:18:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eac7d16a074de4d9e5934842c6e3b8b3 SHA-1: 732dc5b8b168c0259f7bb9aab832628fcb22720d SHA-256: e1e11a06b390a8578fd0820d401c1d739a4731495d1242abaeb4355b0c1d3ce1
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that, when clicked, likely leads to a phishing or malware distribution site. The document body, though heavily obfuscated, appears to be a lure related to car key fob battery replacement, a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://wastran.ru/pbw?utm_term=mitsubishi+lancer+key+fob+battery+replacement
    • https://static.s123-cdn-static.com/uploads/4373999/normal_5feb5d8eb0f1c.pdf
    • https://cdn-cms.f-static.net/uploads/4421050/normal_602bb153bcb39.pdf
    • https://govasosu.weebly.com/uploads/1/3/4/5/134519533/karuwamefi.pdf
    • https://cdn-cms.f-static.net/uploads/4455886/normal_6016c9874d1a4.pdf
    • https://cdn-cms.f-static.net/uploads/4381104/normal_6039bcc5db644.pdf
    • https://tesazovefikuk.weebly.com/uploads/1/3/1/4/131408970/ecd27.pdf
    • https://bikekifo.weebly.com/uploads/1/3/5/3/135304891/sufuj.pdf
    • https://ragidogatekanex.weebly.com/uploads/1/3/4/3/134388076/jofozefezogopafisa.pdf
    • https://xigowobil.weebly.com/uploads/1/3/4/6/134645495/sixizekujaporat.pdf
    • https://cdn-cms.f-static.net/uploads/4409246/normal_5fd3b2e4e5caf.pdf
    • https://bikojeril.weebly.com/uploads/1/3/3/9/133999271/be8f9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kedetuwi.pbworks.com/f/5942055893.pdf
    • http://funinupun.pbworks.com/f/ghost_win_7_32bit_siu_nh_2019.pdf
    • https://uploads.strikinglycdn.com/files/09da84c7-b361-4be7-a9b2-a3c6fd472971/82627917402.pdf
    • http://xuruzinijub.pbworks.com/f/valores_normales_de_amilasa_y_lipasa_serica.pdf
    • http://jesababa.pbworks.com/f/cuantos_ejes_de_simetria_tiene_triangulo.pdf
    • http://vawaguzidatu.pbworks.com/w/file/fetch/144424053/how_to_download_fortnite_on_hp_chromebook.pdf
    • https://uploads.strikinglycdn.com/files/3adf792a-51c1-4203-a8ad-a6a9d90f5e16/tricare_south_region_referral.pdf
    • https://uploads.strikinglycdn.com/files/9d1952b8-04be-4ad9-8723-e5ce4bb71f5f/77978859808.pdf
    • http://sepaxebi.pbworks.com/f/how_can_i_teach_myself_auto_mechanics.pdf
    • http://wuxikadafi.pbworks.com/w/file/fetch/144420903/is_there_an_equalizer_for_spotify.pdf
    • http://lakebimutep.pbworks.com/f/kane_chronicles_book_3_weebly.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_off0000f6bf.bin
fd857cab8ed78f98ef9d77bfcc836144bb670a469353368d6bdd336e50213942		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BF 5568 bytes
font_01_sfnt_off00010994.bin
5a14393a5f744988fe44b950b52072e24fd6e92ec463fc3e3bfbb87a72dfa9a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10994 11484 bytes

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