Malicious PDF — malware analysis report

Static analysis result for SHA-256 dabf51bb0a835483…

MALICIOUS

PDF

72.2 KB Created: 2021-03-18 03:41:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e35572558f310eb100ceb6d899f6e6bd SHA-1: fae13a3340e63ebba2ebd61ee0b82a86bae44d37 SHA-256: dabf51bb0a835483a28e5d099d1d9caa181e1d14c39c1c6676df45aeb6b84217
154 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and one of the extracted URLs, 'https://leonvi.ru/award?keyword=allan+kardec+el+libro+de+los+mediums+pdf', appears to be part of such a farm. The ML classifier and ClamAV detection further support its malicious nature, likely as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8024

Heuristics 4

  • 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
  • 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/award?keyword=allan+kardec+el+libro+de+los+mediums+pdf PDF link annotation
    • https://cdn.sqhk.co/suwitaguf/ghihjbf/kukerorilazulezafisugi.pdfIn PDF document text
    • https://noremovex.weebly.com/uploads/1/3/4/8/134883944/zifimotox-jowuzaxupeno-nadomo-levemewejiw.pdfIn PDF document text
    • https://vunozeguwogiwe.weebly.com/uploads/1/3/4/7/134745761/zenovetu.pdfIn PDF document text
    • https://junezemojevav.weebly.com/uploads/1/3/2/7/132740237/fabuxametuzujerawepu.pdfIn PDF document text
    • https://biwimukapol.weebly.com/uploads/1/3/1/3/131398517/2c9cf414602.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/i4S3ifM/cut_the_rope_2_mod_apk_happymod.pdfIn PDF document text
    • https://jadimakadafi.weebly.com/uploads/1/3/4/3/134378671/vakozaxel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a96bb073-a604-4091-b2b3-8ecc1f64d3e7.filesusr.com/ugd/e3c460_c59324a004ac4cccbe01e4af4dfcd342.pdf?index=trueIn PDF document text
    • https://17d0eb04-815e-47ed-958d-2ea761acaaf9.filesusr.com/ugd/607883_5e23cc3a732a48af874e4f961ffe8818.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/game_dev_tycoon_apk_v1._5._1.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/email_letter_format_business.pdfIn PDF document text
    • https://77da94c0-0f0a-445b-87af-e489a0b5ef66.filesusr.com/ugd/db1da1_02f557dbb3cd42218dd085823eb4dbb9.pdf?index=trueIn PDF document text
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_709839b790a8477ab3e5fd0596b002d9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xarojapi/google_sign_in_android_tutorial.pdfIn PDF document text
    • https://0c6b2c5e-c852-454c-8c01-bea24f6181fd.filesusr.com/ugd/b97644_5aed67ba33424602afc8d580d5eb2ada.pdf?index=trueIn PDF document text
    • https://aa3bb5c3-2bd4-4791-9e2a-6e31d5009b04.filesusr.com/ugd/60e703_f1b146e37dc841cb832455dc09c6864f.pdf?index=trueIn PDF document text
    • https://443275ec-395d-4f86-84c9-2ed7a250e117.filesusr.com/ugd/7d471d_4d138b9eb103416c832501c9cf66d1b6.pdf?index=trueIn PDF document text
    • https://8a89c5bc-485b-4808-980c-66c60e8d9908.filesusr.com/ugd/834936_bda6cf67909244b5af4a8784bf2e476e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jeponowon/ipl_2018_all_team_anthem_song.pdfIn PDF document text
    • https://39dd5e1d-a581-41ec-a80f-9e19245c660f.filesusr.com/ugd/c2656d_45a97eb013cd486b9b983d5a0b70b471.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF000 5492 bytes
SHA-256: 6dc0b4da4657628fedcb1388c1cc9d38be56aa548d591dcefea5cd14e95a690e

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