Malicious PDF — malware analysis report

Static analysis result for SHA-256 52eaaee77210f7b3…

MALICIOUS

PDF

77.2 KB Created: 2021-03-18 05:05:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25a5616947e7df753151fe6158676cfe SHA-1: 20aadf32da7a804517f4f1b72c07c706c6285721 SHA-256: 52eaaee77210f7b3c8448dbca4604c636adc10b1c8020e91a41031227c7d07df
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. The document contains a large number of external links, suggesting it functions as a link farm to distribute further malicious content or phish for information. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://ponafet.ru/wix?keyword=apk+here+sb+game+hacker
    • http://berefiruzo.mygamesonline.org/symbolic_interactionism_sociology.pdf
    • http://jajokojunewi.mypressonline.com/7121368638.pdf
    • https://duxataravur.weebly.com/uploads/1/3/4/0/134017775/b86f2.pdf
    • https://nubesojobe.weebly.com/uploads/1/3/1/3/131398221/800e3e047d.pdf
    • https://bemazinava.weebly.com/uploads/1/3/4/8/134890863/vopoxugemaza.pdf
    • http://juxowupekabaf.mygamesonline.org/66227623664.pdf
    • https://davugunibelerab.weebly.com/uploads/1/3/4/6/134612729/daburujisulori_gazak_zerujexe.pdf
    • https://vumukawa.weebly.com/uploads/1/3/4/6/134662430/toxudijumojip-xexakegapekaxe-doxun.pdf
    • https://nazixusa.weebly.com/uploads/1/3/4/3/134363102/2794946.pdf
    • https://nedatukurugajim.weebly.com/uploads/1/3/6/0/136022322/daxuloben.pdf
    • https://cdn-cms.f-static.net/uploads/4501659/normal_602d50926dbae.pdf
    • https://static.s123-cdn-static.com/uploads/4454436/normal_5fee4c1b978f0.pdf
    • https://novenoberube.weebly.com/uploads/1/3/0/7/130776641/wakemo_ledurikuweb_neloserarerim_jeramule.pdf
    • https://static.s123-cdn-static.com/uploads/4426572/normal_5feb988ee5eac.pdf
    • http://takipibimaxubov.sportsontheweb.net/how_to_use_spirit_items_smash_bros.pdf
    • https://static.s123-cdn-static.com/uploads/4366000/normal_5ff146f6d23e2.pdf
    • https://vadurevagide.weebly.com/uploads/1/3/3/9/133999829/talitad.pdf
    • https://gojijaxokan.weebly.com/uploads/1/3/0/7/130739343/rafugugo.pdf
    • http://pasadurasasagi.medianewsonline.com/voltaire_candide_romana.pdf
    • https://fuvetowonilup.weebly.com/uploads/1/3/1/3/131383456/336c6757.pdf
    • https://static.s123-cdn-static.com/uploads/4458413/normal_5ff274f394c0f.pdf
    • https://sibevuguz.weebly.com/uploads/1/3/4/8/134859718/ad0e0b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wixatax/43604751622.pdf
    • https://s3.amazonaws.com/defipedibe/43575168133.pdf
    • https://s3.amazonaws.com/lixuduwonifa/winelakikupene.pdf
    • https://s3.amazonaws.com/muwomapotumugi/61076012617.pdf
    • https://s3.amazonaws.com/womirofop/how_to_make_microsoft_edge_my_homepage.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_off0000ef7b.bin
6944f5e5304ee42b75f2c3139fc3aa51c548535a196a2044e0cedb8af2ff7e8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7B 5508 bytes
font_01_sfnt_off00010209.bin
706fa1b1be8217e39418e5a509da6bb5adc31c0f6648aae56b80834a3f43e4f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10209 11228 bytes

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