Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce916925773b2163…

MALICIOUS

PDF

82.7 KB Created: 2021-04-04 19:19:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 074a2e14b126a4c7c35300426324f551 SHA-1: ef3ec45da633edc2b5819a8c1f4285b7678a4c02 SHA-256: ce916925773b21631ee40d0c4f486bd4371162466baa3c9de645ac0f8a67b20c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of techniques used to redirect users to malicious sites, potentially for exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jumiwimov.ru/strik?utm_term=what+is+static+and+dynamic+data+structure PDF link annotation
    • http://vezerfa.xyz/40727703397t6eor.pdfIn PDF document text
    • https://jopixumux.weebly.com/uploads/1/3/4/7/134734794/wuvunemalojifupak.pdfIn PDF document text
    • https://cdn.sqhk.co/ribegibonot/pHjeHif/tudalazis.pdfIn PDF document text
    • https://fepunasavejupab.weebly.com/uploads/1/3/1/3/131381111/dokuxoxa.pdfIn PDF document text
    • https://pevidutapare.weebly.com/uploads/1/3/0/7/130740538/foxeki-nigimi-ferepovovoli-niwedirovuwitir.pdfIn PDF document text
    • https://kurikezexiwu.weebly.com/uploads/1/3/0/7/130775092/savedutejalawivawuge.pdfIn PDF document text
    • http://drive4mclaneaustell.com/movomyevzl.pdfIn PDF document text
    • https://wenuzivubog.weebly.com/uploads/1/3/5/3/135392435/5377255.pdfIn PDF document text
    • https://lotigasi.weebly.com/uploads/1/3/4/7/134705720/2145166.pdfIn PDF document text
    • https://cdn.sqhk.co/jitegoji/7P4jfif/relinosedodexuzizot.pdfIn PDF document text
    • https://tevaxuxelajuri.weebly.com/uploads/1/3/2/7/132712575/finusoveg.pdfIn PDF document text
    • https://cdn.sqhk.co/wisulekekij/hdjiPoz/damages_based_agreements_template.pdfIn PDF document text
    • http://tupedesixavero.iblogger.org/377878748.pdfIn PDF document text
    • https://pumebogevi.weebly.com/uploads/1/3/4/5/134583518/nexapuba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/8f8039b0-9859-4f14-9149-2c1d748a2155/roland_tr8s_vs_elektron_digitakt.pdfIn PDF document text
    • http://kobuxotaregudes.rf.gd/monarch_master_water_softener_installation_manual.pdfIn PDF document text
    • http://pobevejilu.rf.gd/sofia_bulgaria_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14eeafcf-0f52-4c57-94a9-361d40e0eef1/mason_county_local_rules.pdfIn PDF document text
    • http://fadakivok.rf.gd/cabal_mobile_apk.pdfIn PDF document text
    • http://degibenogezegu.epizy.com/97162407141.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fbdf885-4a8d-4c45-bbe9-d95bd9dd2e4b/40115085144.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FF 5036 bytes
SHA-256: 2f8872d43f0061b0980d6401afbbb89c0725ca1e1b77fdfe4813aebad9d4cb86
font_01_sfnt_off000108ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108EA 11076 bytes
SHA-256: dc4089718c7317e8995011173c1228cdb713e6d43ee0036dbc6438295a351113
font_02_sfnt_off00012eae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EAE 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c