Malicious PDF — malware analysis report

Static analysis result for SHA-256 83ab8c1de14d50d5…

MALICIOUS

PDF

76.3 KB Created: 2021-03-22 02:32:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63c53696132bc36f970cb5a03cb12d1d SHA-1: 13930491e28b4201e2da7a3715fae35dd48e9a5b SHA-256: 83ab8c1de14d50d5182109eb38c7a3609b181c05bc9be8543f9e89273a27ae96
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of multiple unknown URLs suggests a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a social engineering attack, likely spearphishing, aiming to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://item-get.top/sarunuwinegorimuki9ig.pdf
    • https://static.s123-cdn-static.com/uploads/4464530/normal_5fc9cc907d4fc.pdf
    • http://delayikapy.xyz/do_mayor_acorde_pianoryp42.pdf
    • http://aycotoro6.xyz/96892304257ol9w.pdf
    • https://cdn.sqhk.co/nujekezitifi/jgdChe3/multicraft_login_shockbyte.pdf
    • http://verefdliyvtorogo.xyz/19962418186zfxut.pdf
    • https://cdn.sqhk.co/rolileduvof/jbjezhi/68231216085.pdf
    • https://static.s123-cdn-static.com/uploads/4466175/normal_5ff2a34fcb936.pdf
    • https://wigitofeza.weebly.com/uploads/1/3/2/6/132682623/1662036.pdf
    • https://dowixedazu.weebly.com/uploads/1/3/1/4/131409709/kezuxema_radukinidoweg_zunojadejukep.pdf
    • https://cdn-cms.f-static.net/uploads/4380525/normal_5fe7a6c3ef676.pdf
    • https://barobinamad.weebly.com/uploads/1/3/4/7/134756413/4874525.pdf
    • https://rubusabulolow.weebly.com/uploads/1/3/5/3/135326577/koxuwuxunozawujigo.pdf
    • http://lesantyqas.online/397527605655llvo.pdf
    • https://vunusamonumated.weebly.com/uploads/1/3/4/0/134040658/1167886.pdf
    • https://cdn.sqhk.co/gutinisiv/LsBihje/tirutikovumor.pdf
    • https://cdn.sqhk.co/mofipife/jmLhfhe/28119154904.pdf
    • https://cdn.sqhk.co/mowaxuso/ghbkHLJ/64230876147.pdf
    • https://cdn.sqhk.co/votojuxosaf/jctOijv/75786055819.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://feedproxy.google.com/~r/wb/ENAH/~3/_7yJ53orglQ/wb?keyword=como%20hacer%20ficha%20bibliografica%20de%20un%20pdf
    • https://uploads.strikinglycdn.com/files/abaf49d0-129e-4cf9-8ce7-bc89f65a751b/como_se_prepara_un_sermon_textual.pdf
    • https://uploads.strikinglycdn.com/files/92ca60bf-36c1-47b2-aa4b-b52cee7bb820/hp_z420_workstation_drivers.pdf
    • https://uploads.strikinglycdn.com/files/3b1973d8-677f-49ac-b54e-271bcfad5831/bus_48_schedule.pdf
    • https://uploads.strikinglycdn.com/files/7ab17b2e-c1d3-48c8-81b3-030f2bd83237/oklahoma_drivers_license_written_test_questions.pdf
    • https://uploads.strikinglycdn.com/files/d2d81bde-6643-42a6-9d85-a7c3981ed214/what_does_a_software_developer_do_all_day.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_off0000e9ec.bin
18d42067446297946b58c05de33429b71964f51d8a0aece12d237c4f1a58d4de		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EC 5436 bytes
font_01_sfnt_off0000fc38.bin
4c61e7620314c672b34c8bb9e6341d28dde9ab436b0e3c9c9eae2845530945e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC38 11768 bytes

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