Malicious PDF — malware analysis report

Static analysis result for SHA-256 57d627622940262b…

MALICIOUS

PDF

75.6 KB Created: 2021-03-05 04:34:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c5842de4af5cf2b575e5aab6ff923a50 SHA-1: ba5d9a770d24471a9ca5277ad42fe9268368e9f1 SHA-256: 57d627622940262b954c6cc3f45f5dd87242dd137be1f1e5738c7ae86b7bf13b
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a lure related to 'networking with mikrotik mtcna study guide pdf', aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/strik?utm_term=networking+with+mikrotik+mtcna+study+guide+pdf PDF link annotation
    • http://muldwych.com/4577072991vcjso.pdfIn PDF document text
    • http://fuvisetitisenon.mypressonline.com/tablas_de_integrales_inmediatas.pdfIn PDF document text
    • http://nuxefigemotak.22web.org/ronaldo_wallpaper_hd_4k.pdfIn PDF document text
    • http://lifegirls.site/92182671460502of.pdfIn PDF document text
    • http://mgacessoria.online/what_is_another_word_for_hue_answer4lme0.pdfIn 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/d1caa229-c9b8-4900-88ab-19d2cb45e982/90474809607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/847e6021-6497-4469-b1fb-0dca152105b0/70022921121.pdfIn PDF document text
    • https://5b3500e9-40b4-440a-9ada-171ed8bcf4c9.filesusr.com/ugd/7820d0_ac7282dd37d94367aee15ed3763e8079.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/votawawo/poraxuzajubato.pdfIn PDF document text
    • http://pogetowem.onlinewebshop.net/a_level_chemistry_p4_topical_past_papers.pdfIn PDF document text
    • https://972af30b-04c2-4618-b911-83ba0b7fef9e.filesusr.com/ugd/84a5c6_c8eb92117ab94e649e21b5f80a22d87f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d457bbe-fa29-4836-b229-746f628ab2cc/botofolaxuvutobi.pdfIn PDF document text
    • https://bc732cde-fb09-4fee-8ab5-c82a45a1131b.filesusr.com/ugd/2ac701_4c2d234908bc47149da6a92be2b73ce4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/divexikav/wijit.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/happiness_advantage_orange_frog.pdfIn PDF document text
    • http://nexovototato.epizy.com/25096561617.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/afl_tipping_fixture_2018.pdfIn PDF document text
    • https://70010cfe-69b1-4fe9-a336-bdfe2418dc1e.filesusr.com/ugd/f1d680_e0b310ac5cc04845ab83d2baba7460f4.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE770 5764 bytes
SHA-256: 116bf6aef7901bbebdaa16ff566d02246fe7458b79036bd29a03a41dc7d5c1bd
font_01_sfnt_off0000fb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB06 11160 bytes
SHA-256: 11cbf779bc20dc638f2fdb333b6b2f135049f1c676b5e10b22c2f5f64d58bf17

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