Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2e1c0f0ff4df1b9…

MALICIOUS

PDF

63.9 KB Created: 2021-06-06 05:12:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d8d25cc13ce26471ce3eeba5b2df1b3 SHA-1: bedc9e5b191e56b1ab13e51e0763bd6ced5424ba SHA-256: c2e1c0f0ff4df1b94c355b41e87497ef39846ed67f4d03253181eb7516af3f9d
154 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 ClamAV detection and ML classifier also indicate maliciousness. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the link farm point towards an attempt to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7291

Heuristics 4

  • 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
  • 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://synerhu.ru/pbw?utm_term=microsoft+visual+c%252B%252B+2008+sp1+x64
    • https://gutavavoz.weebly.com/uploads/1/3/4/0/134000423/jumewokewojadod_kokokika_mobik_kotegejafivoda.pdf
    • https://removevas.weebly.com/uploads/1/3/4/4/134443453/zefazosegaso.pdf
    • https://zesoxomilojul.weebly.com/uploads/1/3/4/0/134018604/3e8f1d3b.pdf
    • https://static.s123-cdn-static.com/uploads/4527902/normal_5fc9e80a9e8a3.pdf
    • https://cdn-cms.f-static.net/uploads/4459177/normal_604aa0dbebaf9.pdf
    • https://judirarizase.weebly.com/uploads/1/3/4/6/134645007/kuvoxugiweboguj.pdf
    • https://semitedajun.weebly.com/uploads/1/3/1/6/131636975/45b0fe780d35e13.pdf
    • https://damasijirezox.weebly.com/uploads/1/3/4/5/134528919/868d58a39368.pdf
    • https://vumimexuderuwaz.weebly.com/uploads/1/3/1/8/131871863/zatipog.pdf
    • https://gavokafiwafez.weebly.com/uploads/1/3/1/3/131381231/4862190.pdf
    • https://merotulup.weebly.com/uploads/1/3/4/0/134000288/ralizuzuteda.pdf
    • https://static.s123-cdn-static.com/uploads/4496810/normal_5ffb843d516a3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/40cb305c-546d-4c0f-a4a7-e9d80a9addd3/best_books_for_swing_traders.pdf
    • https://uploads.strikinglycdn.com/files/5218b093-13c7-4485-b44d-63c499ff3fbb/2649657832.pdf
    • https://uploads.strikinglycdn.com/files/7b5ba974-8579-485f-b9a8-6a41b9de88ae/sex_education_season_1_plot.pdf
    • http://dejulagimu.pbworks.com/f/95762069512.pdf
    • https://uploads.strikinglycdn.com/files/2a0a8b60-690a-4cc7-99fe-efdb2c0c84d6/15953783060.pdf
    • http://kejufavo.pbworks.com/w/file/fetch/144701019/19989152392.pdf
    • http://natizasex.pbworks.com/f/multivariate_normal_distribution_mean_and_standard_deviation.pdf
    • http://niwomif.pbworks.com/f/laudate_dominum_piano_solo_sheet_music.pdf
    • http://ruwezebom.pbworks.com/w/file/fetch/144701409/livro_de_clarice_lispector_felicidade_clandestina.pdf
    • http://tufukamapaf.pbworks.com/w/file/fetch/144687447/gemobuwuj.pdf
    • http://nagomax.pbworks.com/w/file/fetch/144694257/fegimaver.pdf
    • http://wuxikadafi.pbworks.com/f/how_to_use_swingline_electric_stapler.pdf
    • http://vawaguzidatu.pbworks.com/w/file/fetch/144423951/lofuneko.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1dc.bin
8c9c95f482a0f8635845f168b812dc94775fce35e4a15429bb3b55045fca4dc0
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DC 5904 bytes