Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc1242023b1f257b…

MALICIOUS

PDF

72.6 KB Created: 2021-01-22 19:30:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1a150af38bb7bd50d20a552d86efac9d SHA-1: d996dc157d7b99ee5e4f4ff0e9ceb1a12254cc39 SHA-256: cc1242023b1f257bd82836ae43ea89ae61a021b0208fed47dd873b813640928a
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were extracted, the high number of links and the nature of the redirector suggest an attempt to lure users to malicious sites.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/wb?keyword=wisconsin%20tractor%20pulls%202020 In PDF document text
    • https://revugegan.weebly.com/uploads/1/3/4/6/134682990/rudedoto.pdfIn PDF document text
    • https://mojikusabuja.weebly.com/uploads/1/3/5/3/135301399/nisif-podanodaku-fogopis.pdfIn PDF document text
    • https://butegipabozu.weebly.com/uploads/1/3/4/2/134235803/wimuzemupev_davukonipajubi_vimefipogu.pdfIn PDF document text
    • https://nokaxogu.weebly.com/uploads/1/3/4/5/134520383/xipisufak.pdfIn PDF document text
    • http://wixiziz.iblogger.org/8798142844.pdfIn PDF document text
    • https://kikobuvikivevir.weebly.com/uploads/1/3/1/4/131437815/latatufopuniwesor.pdfIn PDF document text
    • http://mozovurezet.iblogger.org/30064302694.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404738/normal_5ffe6a96272d6.pdfIn PDF document text
    • http://pufemebulod.22web.org/angularjs_6_interview_questions.pdfIn PDF document text
    • https://pojekemo.weebly.com/uploads/1/3/4/4/134469054/lurejuzudegukulofu.pdfIn PDF document text
    • https://mujabimebedegi.weebly.com/uploads/1/3/4/2/134234846/4895087.pdfIn PDF document text
    • https://duwiwobejul.weebly.com/uploads/1/3/2/7/132740292/sipofavi_kibitaxum_ligope.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://revuzulikasulo.epizy.com/characteristics_of_quantitative_research_methods.pdfIn PDF document text
    • http://nugafafekovad.epizy.com/lulipuzu.pdfIn PDF document text
    • http://tepisivud.epizy.com/45134852811.pdfIn PDF document text
    • http://ribezewipuzez.epizy.com/33288911397.pdfIn PDF document text
    • http://lafebevu.rf.gd/king_size_platform_bed_frame_for_sale.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_off0000ddd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD5 5216 bytes
SHA-256: deff92d0a26e6dab29be7e3ab926af2186bb6748459bbe9cd54e8c724ecc08fa
font_01_sfnt_off0000efb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB2 10740 bytes
SHA-256: 34c02b0d5b1f6cc187b0800c390407c89ef2be3bdc844191bd9a47bd494b416c

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