Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac96897af630fb11…

MALICIOUS

PDF

83.5 KB Created: 2021-09-22 20:13:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f576cfaa213dee1868acda26cd3d585a SHA-1: a0994092497bdd0563205b37db723d8b83625a23 SHA-256: ac96897af630fb11f7de0122d81e4632c896ce9de5a072ae10ed6ab252942d96
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous external URLs, suggesting it functions as a downloader or redirects users to malicious sites. The PDF structure and embedded URIs point towards a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://allytemp.ru/uplcv?utm_term=the+crew+2+apk+android PDF link annotation
    • https://gtnet-engine.com/ckfinder/userfiles/files/vekurunibelinani.pdfIn PDF document text
    • http://myphamvickwhitebeck.vn/luutru/files/makojafetokumumanojosib.pdfIn PDF document text
    • http://thermogroup.ru/uploads/files/57575470432.pdfIn PDF document text
    • https://skywaytravelandholidays.com/ckfinder/userfiles/files/mogomemadawufomexapiz.pdfIn PDF document text
    • http://aibasylhet.edu.bd/app/webroot/ckfinder/userfiles/files/10957196625.pdfIn PDF document text
    • http://medi-sen.com/files/files/42327977983.pdfIn PDF document text
    • http://www.propper-droppers.nl/files/file/13973394994.pdfIn PDF document text
    • http://www.arborvitae.cz/ckfinder/userfiles/files/70436436768.pdfIn PDF document text
    • https://12shio1.com/contents/files/84396769982.pdfIn PDF document text
    • http://pecsimutargygaleria.hu/files/file/kajidasomafo.pdfIn PDF document text
    • http://tylincms.com/userfiles/files/figawotakibogozuzemenuka.pdfIn PDF document text
    • https://talenthunt.biz/userfiles/file/5941089847.pdfIn PDF document text
    • http://yuanjiangchem.com/upload/files/wuweranekidudiripo.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/23455182126.pdfIn PDF document text
    • http://cichanski.com/Upload/file/58815911275.pdfIn PDF document text
    • https://ptogel2.com/contents/files/25703298503.pdfIn PDF document text
    • http://hoangminhceramics.com/app/webroot/uploads/files/30860335632.pdfIn PDF document text
    • http://munnarteabungalows.com/userfiles/file/37815032674.pdfIn PDF document text
    • https://gs-hemeringen.de/ablage/userfiles/files/tesujesi.pdfIn PDF document text
    • http://nedvizhimost-v-sharm-el-sheikhe.ru/uploads/files/wirifa.pdfIn PDF document text
    • https://sushixusa.com/userfiles/files/91501775869.pdfIn PDF document text
    • https://gangnampools.com/contents/files/77748866914.pdfIn PDF document text
    • http://sallytour.com/FileData/ckfinder/files/20210922_92383A07BE8C73B3.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://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_off0000e1e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E0 10560 bytes
SHA-256: 7e4055567d750b3cf393cc9b0e92f5d5474d83d6c5ad6a8b9f440305b90090b0
font_01_sfnt_off0000f9fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FD 17892 bytes
SHA-256: c9ad9dfdd45c8487b48bf9c5d7f7db1b3e02547b07a1a67316b1da98e0368948
font_02_sfnt_off000128c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.