Malicious PDF — malware analysis report

Static analysis result for SHA-256 88b7a2b3820133fa…

MALICIOUS

PDF

74.1 KB Created: 2021-01-26 21:42:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 995e7d7240951b844f5e9cca441c8729 SHA-1: e281c3a1250834f062f34c5806cf99ea33a1c2b0 SHA-256: 88b7a2b3820133fa61ba2456f062ea806b2698cd72d79ffae3c31d3bf3b3b5c8
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wb?keyword=galloway%20united%20methodist%20church%20jackson%20ms In PDF document text
    • https://static.s123-cdn-static.com/uploads/4452608/normal_5fcbe93a2c7fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470543/normal_5fd619b59c3f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452837/normal_600720c04457f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428038/normal_5fc8a37a85516.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490251/normal_5ff282dc0ed54.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/tawosutosuxi/67595599928.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/jinetewanunolopezajopeg.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/gospel_song_u_are_the_reason.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/negoguzopotobamutabum.pdfIn PDF document text
    • http://rixuzomobe.epizy.com/jofixipogotozul.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/sindrome_apnea_hipopnea_del_sueo.pdfIn PDF document text
    • http://wujitotulofok.rf.gd/captel_840i_setup_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/2018_answer_key_ias.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/causation_ratification_of_the_us_constitution_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/61269335825.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/84180922194.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/blue_devils_2017_sheet_music_snare.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/83583577129.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_off0000e481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE481 5544 bytes
SHA-256: a7a6ac3356529ac693b3b416af91acb237331cf2751d59929540e65b455b5cfc
font_01_sfnt_off0000f752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF752 10612 bytes
SHA-256: 28124fa63ac93f1aefdff1d29cf69183b21193e6433d83d585847bad8de5637a

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