Malicious PDF — malware analysis report

Static analysis result for SHA-256 92a6f242492ace52…

MALICIOUS

PDF

91.0 KB Created: 2021-01-28 00:51:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f434c31f7568c2e0c5938fed7bf8a6ce SHA-1: b97300b61937153b7a5eeefb4d61f742db83ce8d SHA-256: 92a6f242492ace5231357f88cee0de998cb64c765d0d7e64ecbe4b44cc2fd3ff
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with critical heuristics identifying it as a malicious redirector and a link farm. The primary malicious URL, 'https://crophysi.ru/aws?utm_term=ludovico+ariosto+l%2527+orlando+furioso+pdf', is flagged as a redirector to malicious infrastructure. The presence of multiple PDF links, including 'https://tujilebofali.weebly.com/uploads/1/3/5/3/135398949/2064598.pdf', suggests an attempt to lure users to external, potentially malicious, content. The ML classifier and ClamAV detection further confirm its malicious nature, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/aws?utm_term=ludovico+ariosto+l%2527+orlando+furioso+pdf In PDF document text
    • https://tujilebofali.weebly.com/uploads/1/3/5/3/135398949/2064598.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480399/normal_5ff85c83bc2bd.pdfIn PDF document text
    • https://cdn.sqhk.co/luxixumogez/NgijcB8/vujoz.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/TrUOnaR/gerajunapufufato.pdfIn PDF document text
    • https://cdn.sqhk.co/bugabowozi/Thrq7zn/multichoice_diski_challenge_results_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453754/normal_5fc8decd9ee23.pdfIn PDF document text
    • http://zemegazi.22web.org/46803845837.pdfIn PDF document text
    • https://rabidibizuzej.weebly.com/uploads/1/3/4/6/134648686/jizosanez.pdfIn PDF document text
    • https://fisezogidegogef.weebly.com/uploads/1/3/2/3/132303301/mivot.pdfIn PDF document text
    • https://tosoremekik.weebly.com/uploads/1/3/4/7/134771766/3598015.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/tapexiw/nurefusorerakarobudaludoz.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/22267055209.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/33610377341.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/report_cover_page_design_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/73154867691.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/vedamijemumidajilut.pdfIn PDF document text
    • http://jepameji.rf.gd/sezedebedefok.pdfIn PDF document text
    • http://wevedikelu.epizy.com/beyblade_burst_games_in_mobile.pdfIn PDF document text
    • http://wisunomimat.epizy.com/ostrich_runner_pc_game.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000119bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BC 2972 bytes
SHA-256: a54b7893a90eb529da7229f7562a5dd47fff2e342442ef4ad71424d977b65b68
font_01_sfnt_off00012465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12465 5184 bytes
SHA-256: 894a559ec9d59de416750194b7b02b408c8c87c6dcc84792886476489e281240
font_02_sfnt_off0001362e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1362E 12732 bytes
SHA-256: d9e4dee00e8e3e0b314bc7a1c745906199e0cb13e881a2eafe73312890fbea23

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