Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e2df4bdb87e6045…

MALICIOUS

PDF

66.7 KB Created: 2020-12-27 18:56:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: dd7fdfe7090a2af4a204af54f1ebd8da SHA-1: e6ac8953d5766126f42714108ba735d98b527e44 SHA-256: 9e2df4bdb87e6045d43f6028d5db2b7744c8582bacaa561840f9c60c99c32a5a
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector and others contributing to a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://ggtraff.ru/wb?keyword=ups%20golf%20bag%20box In PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/timafu-wevaxanarewo.pdfIn PDF document text
    • https://bijuxoku.weebly.com/uploads/1/3/4/9/134901677/forisoxomemepo-boxajebik-nasofiregaj.pdfIn PDF document text
    • https://rokufekajo.weebly.com/uploads/1/3/0/8/130814342/93df0acae693.pdfIn PDF document text
    • https://cdn.sqhk.co/nazabimon/jjcifIW/hitman_goty_legacy_pack_review.pdfIn PDF document text
    • https://cdn.sqhk.co/gogoturowib/ahjidLR/rajigurabeligebiliwarim.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/bededuxotulapil/kamala_das_an_introduction.pdfIn PDF document text
    • https://s3.amazonaws.com/gumagabu/study_bible_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/chelsea_boots_plateformes_2976_en_cuir.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/checking_and_saving_information_in_computer_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/mugevegawusujuzu.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_off0000ca80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA80 5172 bytes
SHA-256: 34d9ce3718bf9e5a03f8ac507053a8f5797918869df32138464aec6bb2129110
font_01_sfnt_off0000dc37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC37 10216 bytes
SHA-256: 5dbbadd54e2052a5452d29523bb613e0b9a5bbb274317614ccf9160421f6c1a1

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