Malicious PDF — malware analysis report

Static analysis result for SHA-256 20e0dc9ae98738ff…

MALICIOUS

PDF

83.2 KB Created: 2021-04-04 17:27:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 88384872f92381bf82b53ee1de320fda SHA-1: 9472bfd28c11499c2f64d68b8754b98b90abc5fa SHA-256: 20e0dc9ae98738ff1f7621380945439204900977453a05f661f1ed39d3d168e7
254 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirection and SEO link farming, pointing to a phishing or malware distribution scheme. The primary malicious URL identified is dafemum.ru, which is used in conjunction with a lure for 'allegiant pdf read online free'. While no scripts were extracted, the PDF structure and embedded links strongly suggest an attempt to redirect the user to a malicious site. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/award?keyword=allegiant+pdf+read+online+free In PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/zoxupusupuzodib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446158/normal_602724075098e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451565/normal_60334a98910d2.pdfIn PDF document text
    • http://jajuviramigawo.medianewsonline.com/4598266483.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/ar_15_parts_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/cyanogenmod_13_for_yureka.pdfIn PDF document text
    • https://femadupimasimu.weebly.com/uploads/1/3/4/5/134594559/5547707.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/gloucester_cathedral_guided_tours.pdfIn PDF document text
    • http://kuzososo.mygamesonline.org/ssb_stenographer_syllabus_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/zmodo_audio_not_working.pdfIn PDF document text
    • http://fisareboveda.getenjoyment.net/english_grammar_tenses_table_free_download.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/4220756.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/social_contract_in_the_constitution_quote.pdfIn PDF document text
    • http://pigetubivefenux.22web.org/cbse_board_exam_maths_question_paper_2020_class_12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418191/normal_6049ee1a63f8f.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/fadawagusowemaw.pdfIn PDF document text
    • https://putevafim.weebly.com/uploads/1/3/4/8/134881436/fusilidufuwezi.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/8299274261.pdfIn PDF document text
    • https://gavizixuf.weebly.com/uploads/1/3/5/3/135334805/72eaf2cd5f3b04.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/division_tables_worksheets_1-_12.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tanadumowijilum.rf.gd/16478044649.pdfIn PDF document text
    • http://tenurusimuxu.epizy.com/george_foreman_outdoor_grill_amazon.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_off0000ee93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE93 5020 bytes
SHA-256: 81dd65e086f45fbf4b6a4b283f06ce4fb3736535cc30845769991394268ed139
font_01_sfnt_off0000ffbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBB 12356 bytes
SHA-256: 7439b1a88a3da393dbdba3527a7c6c64702bb0cdb0907b3d5cffcc750008bf64
font_02_sfnt_off000127ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127EC 16312 bytes
SHA-256: 028dbaa76d48ae99b02248bacea50134e27ed131f5dd39e25ac401de8961e19b