Malicious PDF — malware analysis report

Static analysis result for SHA-256 272cedd41a667928…

MALICIOUS

PDF

75.2 KB Created: 2021-03-02 21:52:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0ceb0a6bacf9ba2943da212f14c5e88b SHA-1: 4884cc75055e4a7c97ca432b4660c7554f86805d SHA-256: 272cedd41a66792839bda28e4fd23952056dd108218787495cbd10449b0ee8f6
126 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is a link farm designed to redirect users to external websites, with one URL specifically mentioning 'am gov 2019-20 pdf'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/wix?keyword=am+gov+2019-20+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381973/normal_603af9d71f701.pdfIn PDF document text
    • https://woxisuxifajise.weebly.com/uploads/1/3/5/4/135400236/lapugelox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493876/normal_6007fceb6dabc.pdfIn PDF document text
    • http://wivaserana.mywebcommunity.org/xodejutirofudijebuwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414871/normal_60182ee93509b.pdfIn PDF document text
    • https://cdn.sqhk.co/fowipovoji/aAjdjcI/30075940395.pdfIn PDF document text
    • http://nenonazuf.scienceontheweb.net/equality_before_the_law_meaning_in_hindi.pdfIn PDF document text
    • https://cdn.sqhk.co/dowotovewi/aghgjFn/party_music_clean.pdfIn PDF document text
    • https://cdn.sqhk.co/foroboreb/ghaq9kY/13631337684.pdfIn PDF document text
    • https://cdn.sqhk.co/mogowepuw/Fzjfjax/80s_music_hits_playlist.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386330/normal_60090f4a364ea.pdfIn PDF document text
    • https://zuwezulexexufup.weebly.com/uploads/1/3/4/5/134582503/9310422.pdfIn PDF document text
    • http://kakolamilasaru.medianewsonline.com/good_group_topics_for_elderly.pdfIn PDF document text
    • http://witikotuxigere.scienceontheweb.net/jedakod.pdfIn PDF document text
    • https://cdn.sqhk.co/nizivatitogu/ahbihsH/school_of_dragons_codes_for_eggs.pdfIn PDF document text
    • https://xisezuvu.weebly.com/uploads/1/3/4/0/134096300/jumanojezisaz-xewidonivuga-pesumudubosaxi-login.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/xixonu/96723577454.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/juxenem.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/class_schedule_template_doc.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/didujedomazezobufolikiku.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F7 5408 bytes
SHA-256: e0140b2c4f7b47e1eff1e15933f7a1c61190f43dded29fdf7ddc1b87a5c3b9ea
font_01_sfnt_off0000e672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE672 10500 bytes
SHA-256: 036755099d673e29970893090cc9837de0429cb64af4763e1405158a9ce36912
font_02_sfnt_off00010a8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8C 16084 bytes
SHA-256: 3dd6252bb62cdcc21e2b76bdeb68ba6c8db9c2d08edae94764e010183c5b1848

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