Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf6ac7d416d4097e…

MALICIOUS

PDF

95.3 KB Created: 2021-05-22 09:22:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: bcfd309fe5f00c99b16cd4e77a57e7a7 SHA-1: 19f694254bb127cbadf2ca63fbbd196db333f0e3 SHA-256: cf6ac7d416d4097e210df778ecfafbc5290d20cb3e0d4578d7e9d9b213e10028
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains text that appears to be a lure related to religious mantras, aiming to trick the user into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://xajibur.ru/strik?utm_term=lakshmi+kubera+gayatri+mantra+lyrics+in+tamil PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418197/normal_605b6a7e444e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416318/normal_606c857447ad4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470681/normal_5fed7381c04cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457861/normal_604aa96d1916f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422371/normal_5fdd79f6451a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410989/normal_606e02571dda0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487201/normal_5fd2ea2157f9a.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0456624a-ce58-4f4a-89d7-15a602e7020f/what_is_cpu_thermal_throttling.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/modamabarumuxike.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/the_warrior_diet_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52c9ba8b-3429-47d0-be1d-53494079fff9/saltwater_fishing_rigs_for_pier.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbb5786e-d373-483b-bb36-49df1a4028b6/famous_quotes_from_the_little_prince_in_french.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daad446e-0ef6-4f45-b63f-eacb774e0d6d/what_is_the_purpose_of_the_trip_in_hills_like_white_elephants.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1542bab5-6066-4ac6-afd8-2a21ce651ff7/wemaxuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5513d2c9-399b-4250-a0ef-70a00e6dd773/how_to_sync_two_ue_speakers.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/cadet_college_rawalpindi_admission_form_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/37285438536.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/xupobidifediluziral.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dd18406-ad34-4c8a-a7d2-b55266c170ce/xasinido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48290b7f-fd98-47c6-bbd5-18d1a5332ec4/zifopofug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53f77c0f-18b2-47ba-a7a5-b743c1222e19/why_is_finland_the_best_education_system_in_the_world.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/ejercicios_de_comprension_lectora_segundo_grado_para_imprimir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc1e1e65-26c1-458e-a2d5-3eda4ab28223/savaku.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/fawixatofobibilumixe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000111b3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x111B3 27716 bytes
SHA-256: ec838ab1cc70bf0e0f3356147dd980902e97bde9a5aa640239acbb728f7f5892
font_00_sfnt_off0000ff40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF40 5460 bytes
SHA-256: c8fd3be4af1de14bd11bade13ef86f47e1fead7a6f2c4c7df2ec04ffb1d7f36b
font_02_sfnt_off0001486f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1486F 10880 bytes
SHA-256: b0662e29e47daf7d45490f3a99dca311413283eba1c7944ab30ff9cd0a223865

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