Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff4d7ac540c473ae…

MALICIOUS

PDF

99.8 KB Created: 2021-03-23 07:41:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e743ab9967d540d3e07ddf2cf1ecbf3a SHA-1: 6477a555c08636bcbcb5ed6bbfae6e48dc0777cf SHA-256: ff4d7ac540c473ae1f9728c1ce850391babff322d62a2b29b9305c993042324c
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a link farm and a high-confidence heuristic flagging an image lure linking to an SEO redirector. The primary malicious URL identified is 'https://resalured.ru/strik?utm_term=ap+psychology+unit+1+review+quizlet', which is likely used for phishing or to serve a second-stage payload. ClamAV also detected this file as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://resalured.ru/strik?utm_term=ap+psychology+unit+1+review+quizlet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413846/normal_5fcb10b090181.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/how_to_pass_ap_physics_1.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/ryobi_2200_generator_spark_plug_gap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413838/normal_5ff1c08655a1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418184/normal_6056707a3be89.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368469/normal_60065c3edf761.pdfIn PDF document text
    • https://ligegumipiwefu.weebly.com/uploads/1/3/3/9/133999845/2743675.pdfIn PDF document text
    • https://fejilexa.weebly.com/uploads/1/3/1/1/131163980/463047.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/cascada_de_coagulacion.pdfIn PDF document text
    • https://s3.amazonaws.com/kukupunopedon/aptamil_gold_2_nutritional_information.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444378/normal_6054e8483539e.pdfIn PDF document text
    • https://pujuwofox.weebly.com/uploads/1/3/4/8/134882524/monejuduwuv-nonilo-ruwenoj-dibixugerijipa.pdfIn PDF document text
    • http://zoxejusozowevo.iblogger.org/44618789158.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366374/normal_600820a4769ba.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/8478415799.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/death_note_light_up_the_new_world_ryuk.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/94353159602.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383308/normal_6017d3b4813ef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393044/normal_5fdfbc65f0cfd.pdfIn PDF document text
    • http://xususebixaxix.iblogger.org/rujilorudirojawa.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/apex_legends_quiz_answers_quiz_delivery.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://getorimojaz.rf.gd/labajotiburizemodiga.pdfIn PDF document text
    • http://nizalag.rf.gd/bickley_script_let_font.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FB 6836 bytes
SHA-256: 4ec285595b8a9d06670b30c7345773cec9ca7c088d77711f01aed2dc7c400a10
font_01_sfnt_off00010a45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A45 5456 bytes
SHA-256: 70b3bac5e73e4765ed0c0ea0d0f8f1a32226735c5722f278cad8b5210eed63ae
font_02_sfnt_off00011cfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CFB 9508 bytes
SHA-256: 149b888408aa254ab0575c183ffd7409afac72dba5c5ee654a61ad341e146689
font_03_sfnt_off00013d9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D9D 11124 bytes
SHA-256: dc53b71aaf0a57a327a5107933758ec79df0768e744c973acf503ee70895aee5
font_04_sfnt_off000163a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163A9 16128 bytes
SHA-256: 3bd93e688f2993b27744791940e9fab5af40a74c6a71fadec7adfc8b757e4bc2
font_05_sfnt_off00017880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17880 1740 bytes
SHA-256: 5f7498f8e433e4c6c47e8ca53e78f46c92ad2660f1d70c8a76bf58ffa4fc47b7