Malicious PDF — malware analysis report

Static analysis result for SHA-256 1803edb24c0419b7…

MALICIOUS

PDF

75.5 KB Created: 2021-02-24 21:36:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: ed5a7578f9e4d238e60152248a2d7edd SHA-1: a5fcf4d5aa1782f2630e9a3420aace79c172fafb SHA-256: 1803edb24c0419b772235a12bfbc1e3d82eaa6583b54ae938eb0f4d07588677d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of external links, many of which are structured to appear as SEO-optimized content, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, with the primary goal being to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://leonvi.ru/wix?keyword=sniper+fury+mod+apk+unlimited+money PDF link annotation
    • http://numulul.mygamesonline.org/87333847806.pdfIn PDF document text
    • https://bezujopejot.weebly.com/uploads/1/3/1/6/131606295/nikeb.pdfIn PDF document text
    • http://mawifit.iblogger.org/zazadutilazuvilerukip.pdfIn PDF document text
    • https://rilavowa.weebly.com/uploads/1/3/2/7/132740415/c3cb05747d.pdfIn PDF document text
    • http://nizavevorupuj.mywebcommunity.org/gusipumefoxopuwinexipizir.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/pokaxobitesibirop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tupazovux.epizy.com/fapapujujizemiwilakufitu.pdfIn PDF document text
    • http://zudupaxub.myartsonline.com/how_to_change_battery_on_a_polaroid_camera.pdfIn PDF document text
    • http://vidugozu.atwebpages.com/72119262536.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/55181240621.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/adobe_reader_dc_free_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/22245733998.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/jysk_saskatoon_bed_sheets.pdfIn PDF document text
    • http://nawopezor.rf.gd/73443287666.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/catalogue_oriflame_maroc_janvier_2019.pdfIn PDF document text
    • http://sabiwilurase.atwebpages.com/how_much_does_a_rheem_furnace_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/ferobanefexekisezenol.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/eclipse_java_ee_8.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB97 5276 bytes
SHA-256: fbb1f96327d16302ff6df2094059f3aedbaff09bbf885d7efab78008a5dee75b
font_01_sfnt_off0000fd83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD83 10184 bytes
SHA-256: 45e1b53e79017496c3e3f95d011b95fda1dd1be1110361f08f10b2f84d631d34

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