Malicious PDF — malware analysis report

Static analysis result for SHA-256 86c2fcfed8343a72…

MALICIOUS

PDF

80.7 KB Created: 2021-03-19 04:22:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: e08b50febd8ecfc87051450804683317 SHA-1: 16cb7aaf728b91500671a4af2c68b1f828d0b085 SHA-256: 86c2fcfed8343a725d81baf0827eb1957f75da3739c490d34a90db7dc324aa7e
156 Risk Score

Malware Insights

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

The PDF contains a link farm heuristic, indicating it is designed to host numerous external links, likely for SEO manipulation or phishing. The primary URL, 'https://xezojetit.ru/wix?keyword=science+olympiad+rules+manual+division+b+2018', suggests a lure to a malicious site disguised as a search result. ClamAV detection and ML classification confirm its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/wix?keyword=science+olympiad+rules+manual+division+b+2018 PDF link annotation
    • https://kawuzuvom.weebly.com/uploads/1/3/1/3/131379118/rukafa.pdfIn PDF document text
    • http://tawojuxonivix.22web.org/chocolate_film_malayalam_songs_free.pdfIn PDF document text
    • http://voiprormul.xyz/78251022333z60vi.pdfIn PDF document text
    • http://lanufutado.22web.org/ramozumagajinisopajiwap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404964/normal_5fc61b2fe4d10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376612/normal_603f4c21ad4f4.pdfIn PDF document text
    • http://homearfes.com/nojupobenol67j.pdfIn PDF document text
    • http://zoom-omsk.ru/graficas_de_funciones_linealesu9ycg.pdfIn PDF document text
    • http://reduslimitaly.website/9979653048i4zgi.pdfIn PDF document text
    • http://kokilubowo.22web.org/ludilujobalidivubes.pdfIn PDF document text
    • http://fb-pageunderreview.com/best_examples_of_product_innovationjub3p.pdfIn PDF document text
    • https://vumerajijo.weebly.com/uploads/1/3/2/8/132815742/dovonamagalosubizawe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lajefuvubesij.epizy.com/kexikozutonoketojaku.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/cognos_report_studio_current_date_time.pdfIn PDF document text
    • http://powavowuzipuvu.epizy.com/polaroid_tablet_9_inch.pdfIn PDF document text
    • http://dikekonigexixa.epizy.com/39599498746.pdfIn PDF document text
    • http://jufofokisib.epizy.com/aadhar_using_otp.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/pitch_deck_template_free_keynote.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/hereditary_gingival_fibromatosis_case_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/chipmunks_version_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/76686465477.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE620 6144 bytes
SHA-256: 0bfb1ee7ee84daf62d8574dd48e8d1cf1bfa17a4cb5fc4e5bb1aeaab745c5722
font_01_sfnt_off0000faf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF5 10576 bytes
SHA-256: c543352dcd2ac254634de48b6a8df7fdec062cb6c27b265712417875f4482c72
font_02_sfnt_off00011f3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F3D 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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