Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8b2a97fbbc38551…

MALICIOUS

PDF

75.5 KB Created: 2021-04-02 06:38:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: dc7f4a522b7f33ee8b5634fb2aa21b80 SHA-1: b93ab3f16d552d2090519976c3d5d2015a5bd4cc SHA-256: e8b2a97fbbc38551c27a26be58facea8fabfef9346116a8385e1621f3e852302
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to drive traffic or host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/aws?utm_term=how+much+is+a+fetal+echocardiogram PDF link annotation
    • http://novijixonusasu.mywebcommunity.org/barron_s_ielts_vocabulary_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/fichacN/call_of_cthulhu_d_d_campaign.pdfIn PDF document text
    • http://maletewidulebil.iblogger.org/ritmos_circadianos_en_plantas.pdfIn PDF document text
    • http://fetedeju.mygamesonline.org/abide_with_me_matt_maher.pdfIn PDF document text
    • https://xasukibumit.weebly.com/uploads/1/3/4/7/134749231/1984420.pdfIn PDF document text
    • https://tasusigogifu.weebly.com/uploads/1/3/5/3/135303518/507c51f.pdfIn PDF document text
    • https://cdn.sqhk.co/sarunasol/bOlgdhd/wawutososod.pdfIn PDF document text
    • http://vegifeda.mypressonline.com/what_is_payback_time_physics.pdfIn PDF document text
    • https://cdn.sqhk.co/vugasoveg/Ige3eus/lullaby_songs_for_kindergarten.pdfIn PDF document text
    • http://tixokapine.mypressonline.com/zarebixidibiwu.pdfIn PDF document text
    • http://visujoj.22web.org/15758324853.pdfIn PDF document text
    • https://cdn.sqhk.co/wenewojufaj/ajhc5ib/9503122879.pdfIn PDF document text
    • https://kojegowi.weebly.com/uploads/1/3/4/6/134685768/fowivometekugo_nazunagedoga_tikula_vodalupogiz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dibulorofo.epizy.com/glory_and_praise_to_our_god_ocp.pdfIn PDF document text
    • http://satogitexuvo.myartsonline.com/almanach_des_sorcires.pdfIn PDF document text
    • https://c8d0f166-86fd-441b-8df5-aa5e6c6c7644.filesusr.com/ugd/f4b3af_46ee0da3f74c4e8eb8d4d149d6f622f9.pdf?index=trueIn PDF document text
    • https://87098103-4d08-48bb-90a6-807b0ef734b2.filesusr.com/ugd/1f49de_600dcc6a74384b17878bc3264c420278.pdf?index=trueIn PDF document text
    • http://dijaduluka.epizy.com/butiguniritozeju.pdfIn PDF document text
    • http://bepibuxel.epizy.com/actor_mexicano_le_da_cachetada_a_reportero.pdfIn PDF document text
    • https://c0add167-8731-41f0-9a7b-3d62f09b0499.filesusr.com/ugd/879476_1070d79c440440cb8aceb879701e8a57.pdf?index=trueIn PDF document text
    • https://684917c6-b594-4497-9ea4-141105166a5b.filesusr.com/ugd/0dc9f5_1d4b802dd3584c7283060e13141642c6.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_off0000ea51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA51 5488 bytes
SHA-256: 1168c0f568c8792c449d7a2159b3d2d7ecf9fbb760f8f646429906b8de832202
font_01_sfnt_off0000fce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE3 10568 bytes
SHA-256: 231152d31e9ac0a05fe904ab522d6430e7ec3cbe4e428be2e5bebf33736255ab