Malicious PDF — malware analysis report

Static analysis result for SHA-256 d35165d5cea78c43…

MALICIOUS

PDF

73.2 KB Created: 2021-02-14 10:23:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2d9f1d589b153d8b0da8260ca3601464 SHA-1: 76d8764cfb665f595a44e146f5539961666f750b SHA-256: d35165d5cea78c43409304b52dad77cc24f17edff46cc1d154b6c513f0a415ad
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://maypoin.ru/aws?utm_term=business+math+worksheets+for+highschool+students PDF link annotation
    • https://boxatikavizag.weebly.com/uploads/1/3/4/6/134680825/677045.pdfIn PDF document text
    • http://kefikajutadab.22web.org/dungeons_and_dragons_5e_unearthed_arcana.pdfIn PDF document text
    • https://relotevifinedu.weebly.com/uploads/1/3/2/6/132683264/diwisifowekin-gesugulawe-sudikaze.pdfIn PDF document text
    • http://maddot.space/quantitative_analysis_of_market_dataihtqv.pdfIn PDF document text
    • http://buyervannakupitvsem.xyz/rexapisisajvo6b.pdfIn PDF document text
    • https://basitonivi.weebly.com/uploads/1/3/4/5/134584834/13ec652d.pdfIn PDF document text
    • https://kixifosesezor.weebly.com/uploads/1/3/3/9/133998007/tewukudababexa.pdfIn PDF document text
    • http://hytri.com/virtual_dj_sampler_sound_effects_pack_free_download1mg0p.pdfIn PDF document text
    • https://xanivumukil.weebly.com/uploads/1/3/1/8/131856382/puwetixukilalezupew.pdfIn PDF document text
    • https://pofifeluvoka.weebly.com/uploads/1/3/0/7/130739131/melojogivedel.pdfIn PDF document text
    • https://pukakiliratof.weebly.com/uploads/1/3/4/7/134768090/4472450.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/luworizesupox/69058044921.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/video_converter_pro_apk_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/lutiwupexowip.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/fetiwu.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_off0000e141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE141 5640 bytes
SHA-256: d2f716ea8eb90e679f6f28614ac1a37d8117d0da42c21d7f9d036ee9d01e5f31
font_01_sfnt_off0000f459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF459 10404 bytes
SHA-256: d31b25493823fbc418d5f7be15c6800e894547131f81ad524fbf161da024b614