Malicious PDF — malware analysis report

Static analysis result for SHA-256 f317d0d402fd5223…

MALICIOUS

PDF

78.3 KB Created: 2021-04-12 09:42:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 0c443dbdccd0390e889b85fdd250f670 SHA-1: 0c73a2f1d3e0b9d64edf36062dc6d16f03d22133 SHA-256: f317d0d402fd52235a0ce549763aef40a779af4fdab85dd7713588f4ff238407
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, forming a link farm, and directs users to a suspicious URL. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=how+to+make+a+origami+heart+bookmark+step+by+step PDF link annotation
    • http://domobifotuza.sportsontheweb.net/lord_byron_she_walks_in_beauty.pdfIn PDF document text
    • https://bemebedutor.weebly.com/uploads/1/3/4/6/134624352/9922525.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/51462852356.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/5729840.pdfIn PDF document text
    • https://rekasefuwe.weebly.com/uploads/1/3/0/9/130969231/4f8fc9db.pdfIn PDF document text
    • http://penageli.getenjoyment.net/does_fender_fuse_work_on_ipad.pdfIn PDF document text
    • https://jovapotokuxeb.weebly.com/uploads/1/3/4/8/134881142/4692725.pdfIn PDF document text
    • http://xenalebosob.scienceontheweb.net/10000_year_explosion.pdfIn PDF document text
    • https://zofitete.weebly.com/uploads/1/3/2/7/132740948/b84d19.pdfIn PDF document text
    • http://rixorevu.getenjoyment.net/functional_groups.pdfIn PDF document text
    • https://ripukalogud.weebly.com/uploads/1/3/4/3/134391837/714010.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pirosisob/wovanetegezidomu.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/sifalevipobusiwusasasiju.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/aditya_birla_sun_life_mf_fatca_form.pdfIn PDF document text
    • http://wazeniwemir.onlinewebshop.net/area_of_combined_shapes_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/jipememuginebodufap.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/schwinn_exercise_bike_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/lowebemuwojiso/93513314918.pdfIn PDF document text
    • http://segurixuzek.myartsonline.com/words_that_start_with_xie.pdfIn PDF document text
    • http://gosaduzunake.myartsonline.com/49736186976.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/topinajopinufomirezapip.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/facebook_like_generator_apk.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_off0000f17f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17F 5560 bytes
SHA-256: 03fab71288d7ea3260288f1ed689131135b73c7e527810314b1839731cc1ad03
font_01_sfnt_off0001044c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044C 11404 bytes
SHA-256: 403e354ae3cbfcbb3dcd5c56adb7c7f8fea97b17028621d92d746082769fcb1b

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