Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c4a1ee1aa3d3907…

MALICIOUS

PDF

80.0 KB Created: 2021-02-26 10:41:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 1b79b5e827fc1c4d9c5d3623b9540ff7 SHA-1: b0d06969627246d5a9803395214d16caf500724b SHA-256: 0c4a1ee1aa3d39079185e0944a476588cd51de7d8e6cbe4fbce7b15cfc2ab000
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains an embedded URI pointing to a suspicious URL, likely intended to trick the user into clicking it. No scripts were extracted, but the presence of the malicious URL and the detection signatures suggest a phishing or trojan delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/strik?utm_term=how+long+does+canon+ink+last PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368496/normal_5ffce1c3ab68b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460981/normal_60130c5cb5d4b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475391/normal_5fcd6f62780d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465252/normal_601762c640d78.pdfIn PDF document text
    • http://euroshopme.site/horror_heartbeat_sound_effect_freesbpgo.pdfIn PDF document text
    • http://cabinetshq.xyz/parts_of_dialysis_machine3ye36.pdfIn PDF document text
    • https://cdn.sqhk.co/lojibuwe/JCbghAo/21583867892.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498376/normal_601faf07b2ad7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411228/normal_5fe8c0193931e.pdfIn PDF document text
    • https://cdn.sqhk.co/leredupodeka/ihbMJs2/guardian_tales_guide_world_3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416810/normal_5fe73ff6929e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380383/normal_5fcf3d009a5cd.pdfIn PDF document text
    • https://cdn.sqhk.co/waxolulum/Gfgjjco/words_that_start_with_h_funny.pdfIn PDF document text
    • http://mabay.fun/argumentao_jurdica02bfd.pdfIn PDF document text
    • http://nikaold.site/revedifarexezektov.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/novifamigot/traffic_racer_apk_hile_indir.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/how_historically_accurate_is_the_bible.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/tufetefenudosasegusibe.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/tojajuxaponomazojoreguw.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/emerald_tablet_translation.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
font_00_sfnt_off0000ef24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF24 4916 bytes
SHA-256: cdd43a0c0b57352d3c782aa3c49e3dc1b508273273fa66710d938edc8469158e
font_01_sfnt_off0000fffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFD 10956 bytes
SHA-256: e70e2f0f49980e1c0c756a04a210a80ed81c42ce140070b76db97a94e0480696
font_02_sfnt_off000124af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124AF 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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