Malicious PDF — malware analysis report

Static analysis result for SHA-256 bac5188d448194f9…

MALICIOUS

PDF

75.1 KB Created: 2021-04-08 13:05:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a98ffce6e1d1ac9f8be1a9f3f6661361 SHA-1: a2274075a3165201325d39f0c6177c6ded80c443 SHA-256: bac5188d448194f93808402e92236bfae40013fae21fd03159526a34fd1d5679
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as a phishing trojan. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://xajibur.ru/strik?utm_term=cleanflight+blheli+esc+calibration PDF link annotation
    • http://kotumixevana.22web.org/is_the_4.7_v8_magnum_a_good_engine.pdfIn PDF document text
    • http://velixone.66ghz.com/hernia_inguinal_sintomas.pdfIn PDF document text
    • http://dabuvede.66ghz.com/95875030881.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417207/normal_6059b5fd12700.pdfIn PDF document text
    • http://fixewizafufigiz.22web.org/63401115734.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393776/normal_601f8a3ad872f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/how_to_get_google_play_on_kindle_fire_hdx_3rd_generation.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/war_and_peace_by_leo_tolstoy.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/creature_full_movie_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fe4a20a-d7be-41c0-a0b4-432a8077b6c8/polaris_office_5_for_android_free_download.pdfIn PDF document text
    • http://bubijijesaxo.epizy.com/milevuf.pdfIn PDF document text
    • http://pimogajen.epizy.com/l_alimentation_quilibre.pdfIn PDF document text
    • http://dosibaguluf.epizy.com/sax_pentatonic_scales.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bc32b0f-fbb0-4527-b281-f23446091c03/kirexumapidorakezuwo.pdfIn PDF document text
    • http://levolavajoji.epizy.com/jorge_baradit_la_dictadura.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/58570836095.pdfIn PDF document text
    • http://widojedup.epizy.com/dawn_dish_soap_sds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69543704-cd1f-4c6c-8800-464fa1e87e1b/dagawakezuzulu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B4 5188 bytes
SHA-256: 961192a6ede3e191a45ccf4d97e92d796e59f01cca4a34b689cef0ae0818eb97
font_01_sfnt_off0000fb56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB56 10520 bytes
SHA-256: 7a5fa9d0498aa991112cc3c1c6a2eadb38778aed5897f82b148b9be0a1db3b5e

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