Malicious PDF — malware analysis report

Static analysis result for SHA-256 4efe5708953cff9e…

MALICIOUS

PDF

78.2 KB Created: 2021-02-13 21:13:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 0e9324070c9502a07175b84c265d939d SHA-1: 48005704484621ab045c97a43c951a3005f18b20 SHA-256: 4efe5708953cff9e59b24170b84d4cac33d32c5edc010c76218243a77ee4dc2c
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to SEO redirectors and link farms, indicating a phishing or malware distribution attempt. Heuristics like 'PDF_SEO_LINK_FARM' and 'PDF_SEO_UTM_REDIRECTOR_LINK' strongly suggest this malicious intent. The ML classifier and ClamAV detection further confirm the malicious nature of the file. While no scripts were explicitly extracted, the PDF structure itself facilitates the redirection to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://bologen.ru/123?utm_term=ethno+political+conflict PDF link annotation
    • https://cdn.sqhk.co/xamitarerivu/dhjiby9/jimojofovigosikonis.pdfIn PDF document text
    • https://cdn.sqhk.co/vadezewe/fiigjhf/57144597440.pdfIn PDF document text
    • https://bukowimulo.weebly.com/uploads/1/3/1/4/131407836/fowotadijunizemu.pdfIn PDF document text
    • https://cdn.sqhk.co/naxusepimosa/eQEijhe/world_war_z_2_full_movie_download.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
    • http://bedekopezedegej.rf.gd/34538232706.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/46173507330.pdfIn PDF document text
    • http://zutulig.epizy.com/energy_android_smart_tv_box_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/sugizipidapexa.pdfIn PDF document text
    • http://nolonogatifotop.epizy.com/advanced_custom_fields_pro_nulled.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/metformin_er_500_mg_diarrhea.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/bba_aviation_annual_report_2005.pdfIn PDF document text
    • http://wizasagi.rf.gd/branding_design_mockup_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/banakonevenuw.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/the_thriller_malayalam_movie_tamilrockers.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/australia_map_with_states.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_off0000e91e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91E 4456 bytes
SHA-256: a378aa79a976d3d5af6797c3d161769ab1791f073e8d8e07abd6cc0f7a820350
font_01_sfnt_off0000f82c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82C 11064 bytes
SHA-256: 3fda0cef5c8bbb85c1f70de6d309b3fcc73caa15605acee8656a42003fd1c053
font_02_sfnt_off00011d8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D8F 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

Open this report in the interactive analyzer, or submit your own file for analysis.