Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cd5ef9da24a595d…

MALICIOUS

PDF

87.2 KB Created: 2021-05-14 23:29:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d8e57222944546cbe3724e06e88dd336 SHA-1: a200f359aeda1c275d19d1b1758876d2c99d2767 SHA-256: 0cd5ef9da24a595dc124a301f858bc9a1e266e5b72af518d618394b71ecaf149
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dugedepap.ru/strik?utm_term=best+atlanta+night+spots PDF link annotation
    • https://zowupenejanelaw.weebly.com/uploads/1/3/4/3/134397621/7b8eb.pdfIn PDF document text
    • https://boxorefo.weebly.com/uploads/1/3/0/9/130969922/vulifixusunatibotozo.pdfIn PDF document text
    • https://cdn.sqhk.co/judigirowe/gihhcia/digital_school_memes.pdfIn PDF document text
    • https://jimigafekalese.weebly.com/uploads/1/3/1/4/131407537/1947299.pdfIn PDF document text
    • https://zogininofifus.weebly.com/uploads/1/3/2/6/132695288/zavafuweji_noraxevoki.pdfIn PDF document text
    • https://cdn.sqhk.co/zozijawutuxu/gv6xgdN/zepajev.pdfIn PDF document text
    • https://cdn.sqhk.co/rawerusiwala/h2jj5hj/iphone_khng_c_c_file.pdfIn PDF document text
    • https://jadojojipolukot.weebly.com/uploads/1/3/5/3/135337887/kowov-bujev-tijoripos-rofojog.pdfIn PDF document text
    • https://cdn.sqhk.co/radageroboko/jjaoHp7/restaurant_halloween_salon_de_provence_chinois.pdfIn PDF document text
    • https://cdn.sqhk.co/gudijupimeb/icHxRhe/racing_car_games_download_apkpure.pdfIn PDF document text
    • https://kozuliwibiji.weebly.com/uploads/1/3/4/7/134705154/susixovinuxikek.pdfIn PDF document text
    • https://cdn.sqhk.co/xadowififux/idQfDaJ/ladopugotikokudukasaleba.pdfIn PDF document text
    • https://cdn.sqhk.co/rovujesox/iWxgwrW/vuxonaredudewidovorobixo.pdfIn PDF document text
    • https://xalemutaxites.weebly.com/uploads/1/3/0/9/130969461/rabidaviwunili-posexanuni.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wumekupewug.rf.gd/lemoxaxi.pdfIn PDF document text
    • http://rasezejibaf.rf.gd/gafeviwitapag.pdfIn PDF document text
    • https://af18ad75-7652-4b25-b9e0-8da5fded0af1.filesusr.com/ugd/529385_3fa5fe09a1474e5e87dd70e99f505ada.pdf?index=trueIn PDF document text
    • https://c5e26362-acc3-4c40-9db4-ce0cbd355080.filesusr.com/ugd/681527_aa6d01d3e5494f58a53cdf9b2e84f24b.pdf?index=trueIn PDF document text
    • http://moxilapavaz.rf.gd/cell_differentiation_journal.pdfIn PDF document text
    • http://jovigoxuja.epizy.com/33300285934.pdfIn PDF document text
    • https://73099f28-10d5-4558-98a1-2f8dc61f1a2f.filesusr.com/ugd/f62eaa_0cd409c8c5da4f77988b2e6c8eb4200d.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001083a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1083A 5036 bytes
SHA-256: 4f1fc59d5586c33098d6ba3759571b790c247728492d61921bfca50526e5dede
font_01_sfnt_off00011957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11957 2704 bytes
SHA-256: e08988f372395442c757db6cac7fae35359356e24e06bf2009546db257a5c29b
font_02_sfnt_off00012511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12511 12536 bytes
SHA-256: 188a2237ae30f3a2d80400ed33bf5f04c7c3563410c572f6073397b20cd0d81b