Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbb779363be3a078…

MALICIOUS

PDF

87.1 KB Created: 2021-03-29 18:40:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d148a93baa223dd1278921009a2423a4 SHA-1: b531434cacbef71da30923e7840de1fe36f750da SHA-256: fbb779363be3a07822a91a34090c4d300bbd378fc84fd63a376a86d6ee5f44bb
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the PDF_URI heuristic indicates external URLs are present, and the ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/wix?keyword=california+rail+map
    • http://zijukikov.mypressonline.com/casio_fx_350ms_manual.pdf
    • http://pihodze.com/call_of_duty_mw3_cheats_xbox_360_unlimited_ammodo3xo.pdf
    • http://pay-order.info/gomixejovelekapijomazexat1rmm8.pdf
    • https://gonotelavekufuf.weebly.com/uploads/1/3/4/6/134615299/6d29f0a0.pdf
    • http://winsl.space/mortal_kombat_all_scorpion_costumesrsjfu.pdf
    • http://creamwalls.online/edipo_rey_antigona_electra_zig_zag623t7.pdf
    • http://car-test.pro/31042681900ghhfz.pdf
    • http://itnegozio.info/what_is_processor_thermal_trip9hari.pdf
    • https://lafimidoxugimu.weebly.com/uploads/1/3/4/5/134505664/suvonokowugazu.pdf
    • http://about-central.com/75313527200lulb7.pdf
    • https://gazekusiparisom.weebly.com/uploads/1/3/4/0/134012522/rerudepitok.pdf
    • http://jagelajovanapu.22web.org/attack_on_titan_live-action_movie_part_2_end_of_the_world.pdf
    • https://genezekanoz.weebly.com/uploads/1/3/1/4/131413678/1b9d85d2e9487.pdf
    • https://jewelilug.weebly.com/uploads/1/3/4/3/134331877/f2ad7bc2f.pdf
    • https://bumibaniligaza.weebly.com/uploads/1/3/1/3/131383581/599145.pdf
    • https://wutosalix.weebly.com/uploads/1/3/4/6/134635680/6ecb347.pdf
    • https://wanusasa.weebly.com/uploads/1/3/1/0/131070791/mubujefetodoj_wevonine.pdf
    • https://lavozeto.weebly.com/uploads/1/3/0/7/130775819/zedeto.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pabewuvuxaf.onlinewebshop.net/96901573230.pdf
    • http://sifebitufol.onlinewebshop.net/junudopatofuwugumavon.pdf
    • http://foxorefo.epizy.com/inscription_formation_agregation_interne_eps_creteil.pdf
    • http://pepawelifebin.rf.gd/zumafotosalufe.pdf
    • http://kavuduvolilazod.myartsonline.com/agananooru_book.pdf
    • http://bujekotu.atwebpages.com/brand_awareness_survey.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011750.bin
8206c49d32f3f9a2735afe840f1b838a069328e6744f4c3bc9ad34441ce63ad8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11750 4772 bytes
font_01_sfnt_off00012775.bin
58d780a603486f844091b7d092fef500c6ca51bacfa52138d797b8f3baac08f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12775 11680 bytes

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