Malicious PDF — malware analysis report

Static analysis result for SHA-256 16058617c8530440…

MALICIOUS

PDF

77.1 KB Created: 2021-03-06 07:13:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 466cea4d10718be351de5e5f8aaaa342 SHA-1: 716dc5b2c2955862723136f4460e7183901e7605 SHA-256: 16058617c85304403248941761caf35a1c7ae02bb15f39d1a67f9c38b88de00e
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. ClamAV detection and ML classification confirm its malicious nature. While no scripts were explicitly extracted, the presence of numerous external URLs indicates a likely attempt to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/123?utm_term=reiki+master+certification+online
    • http://betijeduw.getenjoyment.net/is_gimp_safe_to_download_reddit.pdf
    • https://pijuvadugodawa.weebly.com/uploads/1/3/4/3/134307721/3ffad7874.pdf
    • https://cdn.sqhk.co/zuxolusufa/kx7Akib/todoxukefi.pdf
    • https://cdn.sqhk.co/kowetitemaro/ficxg6C/pidogibafejoduz.pdf
    • http://zevibeponakat.getenjoyment.net/how_can_i_connect_my_directv_to_the_internet.pdf
    • https://zinegekoxemajaj.weebly.com/uploads/1/3/4/7/134767253/03b91.pdf
    • https://cdn.sqhk.co/tatidukigag/hgjWEd3/super_phantom_cat_2_apk_download.pdf
    • https://cdn.sqhk.co/towevefizub/jhjcgeS/hair_braiding_salon_nyc.pdf
    • https://musabonaxuzu.weebly.com/uploads/1/3/2/8/132815830/jadurideligajuxi.pdf
    • https://cdn.sqhk.co/zasemewiti/jghahjb/cat_jumping_on_counter.pdf
    • http://bikejesoxatelo.mygamesonline.org/what_does_it_mean_to_be_filled_with_the_knowledge_of_gods_will.pdf
    • https://wuwinotidewav.weebly.com/uploads/1/3/5/3/135349353/zanugitatur_davogavefonon.pdf
    • https://cdn.sqhk.co/julukimesof/aOTjghh/q_launcher_android_10_apk.pdf
    • https://zunejafeg.weebly.com/uploads/1/3/4/3/134382709/setibuj.pdf
    • https://cdn.sqhk.co/rezeribevi/mXtgiDt/century_21_rego_park_mall_hours.pdf
    • https://xuvupidorok.weebly.com/uploads/1/3/1/4/131407629/4161384.pdf
    • https://cdn.sqhk.co/nogorodizet/wW6ohgD/xuzewevupizigolimokusezo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://suxudogakol.myartsonline.com/zulogefubesekeruzovut.pdf
    • http://tuminexozuvino.atwebpages.com/chartered_financial_analyst_salary_in_india.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e77a.bin
a5963ac22ce7e2ffeb8481c559afa1f1fe81d44bfab46efbad19cc2fa258231f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE77A 4888 bytes
font_01_sfnt_off0000f7f2.bin
687726bdc3ab3c278eb4062a9469579712f15d69e9743f38df13c66716a0b1b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F2 9640 bytes
font_02_sfnt_off000118f1.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118F1 4324 bytes

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