Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9623af0cedf54ad…

MALICIOUS

PDF

75.3 KB Created: 2021-03-01 07:13:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: dae7bca381afa20f45a0d895f5672760 SHA-1: 5bf6c8cd2246ca93bc8fe56775865e9e3e077d7f SHA-256: d9623af0cedf54ad5369b598934354de52432f34ae1112408803de68d37e640a
214 Risk Score

Malware Insights

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

This PDF file contains numerous links, many of which point to known malicious redirectors or are part of a link farm designed to manipulate search engine results. The document body, though heavily corrupted, contains text related to 'binary options', suggesting a phishing or scam lure. The ClamAV detection and ML classifier further support its malicious nature, indicating it likely serves as a phishing document or a dropper for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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.
  • 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://yafferge.ru/aws?utm_term=when+to+enter+a+trade+in+binary+options In PDF document text
    • https://static.s123-cdn-static.com/uploads/4375199/normal_5fecbf3e9c3cf.pdfIn PDF document text
    • http://gojavodevagajuw.mygamesonline.org/what_does_tenth_mean_sentenced_to_time_served.pdfIn PDF document text
    • https://ragitodis.weebly.com/uploads/1/3/4/7/134753297/bizuso-mobibamoz-gezututekenu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406771/normal_6037f12302673.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/what_is_a_social_thinker.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379030/normal_6002bb04b30e6.pdfIn PDF document text
    • https://vejazejama.weebly.com/uploads/1/3/1/3/131381369/tamexogob-lifirunefet-zifeti-zaluref.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417212/normal_6009cc2001b5c.pdfIn PDF document text
    • https://sagedawigaput.weebly.com/uploads/1/3/4/3/134336778/5457432.pdfIn PDF document text
    • http://nupewijanetari.medianewsonline.com/dinexun.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/perurulexi/ridgid_shop_vac_12_gallon_4.25_hp_filter.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/how_do_i_calculate_sprinkler_flow_rate.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/chemistry_2011_web_series.pdfIn PDF document text
    • http://vumamuv.myartsonline.com/2013_ford_f350_service_truck.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/ar_er_ir_verb_conjugation_worksheets.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_off0000e6aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AA 5272 bytes
SHA-256: 9770d341e985c9d19c74c32cbd4c80f759a4f697e47be0b6bf74a61b30cf5637
font_01_sfnt_off0000f896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF896 11920 bytes
SHA-256: e3b1f311bbfbdcad82c349cd73a956514f7466cd189de1f3826b32573dd1eff8

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