Malicious PDF — malware analysis report

Static analysis result for SHA-256 8652f1f37e1391cc…

MALICIOUS

PDF

78.0 KB Created: 2021-03-19 09:40:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f840992d873163dedbed1a0a3b592b80 SHA-1: 528ff6b38bdb35459fa29cc3cce9b77316c521e9 SHA-256: 8652f1f37e1391cca4fbab67e37289a76fb76951a85596be7c9c4a41862b9ccf
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 phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of numerous URLs points towards an attempt to redirect the user to malicious or compromised sites.

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/strik?utm_term=the+trumpet+of+the+swan+story
    • https://cdn.sqhk.co/jerivudofin/bzkpghJ/61288897001.pdf
    • https://cdn.sqhk.co/kavejufa/digfPrM/fujonadu.pdf
    • http://gemubanabugawa.mypressonline.com/rexuvurojorosobirogigid.pdf
    • https://cdn.sqhk.co/zejizoguzut/gf3RDfB/lone_survivor_netflix_2019.pdf
    • http://ketoxitigojaluk.sportsontheweb.net/95503152662.pdf
    • http://fitatuvepejozo.sportsontheweb.net/arumi_e.pdf
    • https://static.s123-cdn-static.com/uploads/4481509/normal_5fc6b0c14d8dc.pdf
    • https://muluxadi.weebly.com/uploads/1/3/1/4/131453645/5532698.pdf
    • https://cdn.sqhk.co/filodomazora/zgdifhd/free_vpn_unseen_online_download_apk.pdf
    • https://cdn.sqhk.co/vovawumusa/xhhSkl0/car_simulator_og_hack_download.pdf
    • http://rijoginijamibeg.mypressonline.com/25413637539.pdf
    • https://dotofinadi.weebly.com/uploads/1/3/0/7/130740455/3684377.pdf
    • https://cdn-cms.f-static.net/uploads/4385647/normal_6030a0a16ba69.pdf
    • https://cdn-cms.f-static.net/uploads/4392470/normal_60270e7ba8a68.pdf
    • https://cdn.sqhk.co/mumeriretepi/hhBMojj/2428983144.pdf
    • https://cdn-cms.f-static.net/uploads/4490722/normal_60141e5108792.pdf
    • https://cdn.sqhk.co/nuzifixe/eqUxqTT/xugotidusakavuguweg.pdf
    • http://rigudozefogo.mypressonline.com/how_to_adjust_color_on_a_vizio_tv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fumibilulad.atwebpages.com/in_search_of_lost_time_free_download.pdf
    • http://vekisofekibote.myartsonline.com/muvofu.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_off0000f31a.bin
67e85cc8f4826650842a431744c791347205f4429c66a3e1fe54c74208ea7b38		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF31A 5252 bytes
font_01_sfnt_off000104e1.bin
9a7ba15f8b6d0346a545b66d59de66b9bbd58d84631187452e27d6a2242f2d5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104E1 11300 bytes

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