Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ffdc86e9d45177a…

MALICIOUS

PDF

84.3 KB Created: 2021-03-23 09:23:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f58b8bab4f5afaf5bf848e5401fc5f53 SHA-1: 5bbf1eb65c2879c08dc2ddb06c321aaa0673c9d4 SHA-256: 9ffdc86e9d45177a1b581642819fc0d3de03186560c455eaf23305934e6a8fa4
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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://pelibifir.ru/strik?utm_term=bollinger+bands+investopedia PDF link annotation
    • https://xobagesimijuvu.weebly.com/uploads/1/3/0/7/130776740/f54cd686ca3bd1.pdfIn PDF document text
    • https://sixuvowapunara.weebly.com/uploads/1/3/0/7/130738553/b21e57a.pdfIn PDF document text
    • https://geligike.weebly.com/uploads/1/3/4/5/134590657/3638820.pdfIn PDF document text
    • https://donurufeto.weebly.com/uploads/1/3/4/8/134898164/9386809.pdfIn PDF document text
    • http://voxamuzovo.22web.org/critical_thinking_questions_and_answers_for_interview.pdfIn PDF document text
    • https://gebobofivogaxe.weebly.com/uploads/1/3/5/3/135308574/4871193.pdfIn PDF document text
    • https://cdn.sqhk.co/runudori/wSYkuhj/pitagaworuw.pdfIn PDF document text
    • https://paleforekirito.weebly.com/uploads/1/3/4/5/134579508/54a244.pdfIn PDF document text
    • https://lufisadoxusixa.weebly.com/uploads/1/3/4/5/134583632/ee20e1.pdfIn PDF document text
    • https://gawokuvaz.weebly.com/uploads/1/3/4/6/134656265/zijajimoravuzu-pisudipewogut-kinizefon.pdfIn PDF document text
    • https://xijafidul.weebly.com/uploads/1/3/2/3/132303061/zejoriranux.pdfIn PDF document text
    • https://tokuniti.weebly.com/uploads/1/3/4/3/134331772/656485a0.pdfIn PDF document text
    • https://wasitenatibasi.weebly.com/uploads/1/3/4/8/134890771/2558d2e49b.pdfIn PDF document text
    • https://cdn.sqhk.co/xavaxonad/gdcW1hj/fapakumejejosizepuvi.pdfIn PDF document text
    • https://fudanologakobur.weebly.com/uploads/1/3/5/3/135394175/gesimusa-gugeguluripuxij-daxotidabul.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/xupizewuxere/free_florida_boat_bill_of_sale_form.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/73698768085.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/is_the_new_moon_good_luck.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/63385441050.pdfIn PDF document text
    • http://jajujej.rf.gd/how_to_change_versa_lite_band.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/mulevojejobuxabugezi.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_off0001066d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066D 5376 bytes
SHA-256: e638d949aa4fb2d557b5ab58b7ce57779a489a2c8f85f3da6302381cbe0d0719
font_01_sfnt_off000118c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118C4 12308 bytes
SHA-256: b76b4c87fd62132188fbe3141c4fc575aeeab195ccfd7cb7b43b2d018581417b

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