Malicious PDF — malware analysis report

Static analysis result for SHA-256 65e37252b33351c4…

MALICIOUS

PDF

75.0 KB Created: 2021-04-03 04:01:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b80b409ed0e2c1996e5d4db036f55d1 SHA-1: d048b3d2237705650566ef6881fa7b6738af9950 SHA-256: 65e37252b33351c4e949e3e6d10b9bcd649a28b250932f74d7ba49c4b87192ba
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains multiple embedded URLs, one of which, 'https://dafemum.ru/strik?utm_term=what+is+in+freckle+juice+recipe', is directly referenced by a PDF_URI heuristic. This suggests the PDF is designed to redirect users to a phishing site. No scripts were extracted, but the presence of embedded URIs and the high confidence detection indicate a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dafemum.ru/strik?utm_term=what+is+in+freckle+juice+recipe
    • http://bossyonlinex.com/frozen_2_full_movie_720pev90n.pdf
    • http://cherrypimp.online/xovatemuxevogodjhna.pdf
    • http://merokomazojewi.scienceontheweb.net/bojuravav.pdf
    • http://scarcebook.com/775338746564zec8.pdf
    • http://tefitagesev.mypressonline.com/regiwaravitovateba.pdf
    • https://cdn-cms.f-static.net/uploads/4409411/normal_604808a8cb4bf.pdf
    • http://kolomata.ru/a_que_edad_se_deben_bautizar_los_nios_segn_la_bibliaq58be.pdf
    • http://hushseo.online/how_to_remove_plastic_from_an_electric_stove_topgu3jm.pdf
    • https://cdn-cms.f-static.net/uploads/4499319/normal_6041769aeb54b.pdf
    • https://cdn-cms.f-static.net/uploads/4465012/normal_603dd06b7d8e3.pdf
    • http://jilet1.club/western_manor_apartments_kannur69hcv.pdf
    • https://cdn-cms.f-static.net/uploads/4476010/normal_6038902edde9a.pdf
    • http://citruss.space/33051684404hiwem.pdf
    • http://xelibirujegid.mywebcommunity.org/adobe_acrobat_word_count.pdf
    • https://static.s123-cdn-static.com/uploads/4365539/normal_5fcaa6ed286b6.pdf
    • https://cdn-cms.f-static.net/uploads/4462368/normal_600d3ca0a8fe6.pdf
    • http://wrestling-mma.com/42318425219z5r24.pdf
    • http://damita.fun/kikijuwomakasipunum34dgq.pdf
    • http://bioforce-co.site/what_can_you_use_to_clean_a_glass_cooktopkttsn.pdf
    • http://koolmaxt.online/96762107082qg1d6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000e439.bin
5f459251cf173188cd6d4bc98b094aa53158000bc86ac6a415ff6efbc0226340
pdf-font-stream PDF embedded font (sfnt) at offset 0xE439 5256 bytes
font_01_sfnt_off0000f62b.bin
8aeeda41b303e48740a0d637d2f3a8421eb6100c097350c01dd6f362532d16ab
pdf-font-stream PDF embedded font (sfnt) at offset 0xF62B 11564 bytes