Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc720799a02d74a9…

MALICIOUS

PDF

79.7 KB Created: 2021-04-29 05:45:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7789613c728a17e2f48a59974ee2c0c SHA-1: d256711e85c56ae8a49630b9db5901c5f4065993 SHA-256: fc720799a02d74a953b5d50aeb3ae92c549c16f5ab3de247e2bfa7bf3034f957
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or distribution mechanism for malicious content. The presence of embedded URLs and the PDF structure strongly suggest an attempt to redirect users to malicious sites, likely for phishing or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/strik?utm_term=sunbeam+water+cooler+heater+not+working
    • https://cdn-cms.f-static.net/uploads/4418368/normal_605cacf3e9c0c.pdf
    • http://vizazovabula.mywebcommunity.org/fazoxadugavilakajufisufum.pdf
    • https://sodujamewo.weebly.com/uploads/1/3/4/7/134750465/depedolefuj-batajidireto-jiwokejuxoju-dewigexajap.pdf
    • http://criticcxck.space/why_has_my_wifi_keyboard_stopped_workingpzir2.pdf
    • http://mevixonur.mywebcommunity.org/tratamiento_nutricional_para_alzheimer.pdf
    • http://idealicaufficiale.website/fida_movie_songs_free_download_naa_songsvh474.pdf
    • https://fugokepak.weebly.com/uploads/1/3/4/8/134856046/xunixewa_roperizoxob_vubim_babap.pdf
    • https://xenuwupe.weebly.com/uploads/1/3/5/3/135329542/a2bd31824714.pdf
    • https://jalamipitifem.weebly.com/uploads/1/3/0/7/130738892/lepalazukopelajokom.pdf
    • http://instapodarok365.site/37323383140uql4k.pdf
    • http://sowoxapexemex.sportsontheweb.net/vamikitadiverekusapibiv.pdf
    • https://cdn-cms.f-static.net/uploads/4453891/normal_60187f55055ba.pdf
    • https://cdn-cms.f-static.net/uploads/4387033/normal_603b3fcb4547c.pdf
    • https://mixodozom.weebly.com/uploads/1/3/4/3/134333910/2029461.pdf
    • http://erkutungotu.com/bakabawifedaguzisataj77ga.pdf
    • https://tojawejememu.weebly.com/uploads/1/3/2/6/132682640/lanubitukenotu.pdf
    • https://cdn-cms.f-static.net/uploads/4499942/normal_6028f45a7f412.pdf
    • https://gawujura.weebly.com/uploads/1/3/5/3/135325150/punipog-zoseka.pdf
    • http://junumidutuzakox.getenjoyment.net/how_to_troubleshoot_a_thermostat.pdf
    • http://hookup753.fun/desob2slmu.pdf
    • https://jewigilimeb.weebly.com/uploads/1/3/1/4/131408849/c1b71145b0d4e21.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000f853.bin
dd220ce7c7f618cba5378db083c3679604fb55edabe95fa57564b943e89e04bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF853 5436 bytes
font_01_sfnt_off00010ab6.bin
14f1d1eea53ed9c8b330f09f4580e2d447505348aa9af2d8d4ec06fdaf7a4cd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB6 11168 bytes

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