Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f7f13eed7730593…

MALICIOUS

PDF

79.1 KB Created: 2021-04-04 02:20:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 14a0135800030b6f4a73f5d88d19d9f7 SHA-1: 58fd91693e4b34fd3eee405846da02d6fa89c3d6 SHA-256: 8f7f13eed7730593c81d533cd9f75522533b3fb6e71de578d12c1cc1f8affdc2
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to potentially malicious domains, as indicated by the PDF_SEO_LINK_FARM heuristic. One prominent URL, https://botokaw.ru/award?keyword=suddenly+last+summer+full+play+pdf, suggests a lure to a fake search result page. ClamAV detection and ML classification further support its malicious nature, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/award?keyword=suddenly+last+summer+full+play+pdf PDF link annotation
    • http://xitabijasava.getenjoyment.net/mcgraw_hill_cissp_all-in-one_exam_guide.pdfIn PDF document text
    • http://xenakasewexibal.sportsontheweb.net/tuxebuvunemito.pdfIn PDF document text
    • http://tebeririz.scienceontheweb.net/words_to_describe_poetry.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/xilasisefi/90584420912.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1201d1d-f0de-4eda-b12c-021590085ce5/is_sportsman_a_good_generator.pdfIn PDF document text
    • https://c69a8150-bb1e-4c46-878b-fc1622391bd7.filesusr.com/ugd/cf91d6_83fb779f66fd4f4ea2449b271c530e1d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/baxunaf/52604034113.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d42fce6-9612-403a-9046-bf1b3936fa21/15781015110.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/marcomms_plan_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/integrative_literature_review_a_research_method_to_incorporate_evidence_in_health_care_and_nursing.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/59714170712.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/93699311838.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/lawulo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffb934dd-b692-4b7b-a071-52671e2485b6/how_do_i_activate_voice_on_google_maps_on_my_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/regubowo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2b06c76-df3a-4574-969e-41cf3e852c8d/kikavuragivike.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/battleship_2_movie_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/27187673447.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/rizarekezuwanifu.pdfIn PDF document text
    • https://19972ee8-34f0-4900-8009-9f590161cd02.filesusr.com/ugd/64db51_bebd5ef4f1f24e279fb8d31ebfdde485.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/43930121845.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_off0000f748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF748 5392 bytes
SHA-256: b80b15ed4918f01200f2bb7558e167fa4206484c31d43bcda70305114b27068a
font_01_sfnt_off00010990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10990 10940 bytes
SHA-256: 764689844091ea8a0ed24dcbf417cc1dfdc7418eab6877c92c9838d677d88473

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