Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2bf83023fea111a…

MALICIOUS

PDF

113.9 KB Created: 2020-12-21 04:39:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a1b6881efa48512820c0ec121dfdf5a8 SHA-1: ef8db60d60f95791d52f173b9ab0eecbf07d889e SHA-256: c2bf83023fea111a537ebf0fe71ebf1acc8d0d54edd434ae77404b0bc2911b34
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL 'https://traffking.ru/123?utm_term=tv+guide+st+petersburg+fl' is the primary indicator of this malicious redirection. While no scripts were explicitly extracted, the nature of PDF redirects often involves embedded JavaScript to facilitate the redirection, hence the inclusion of T1059.007.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://traffking.ru/123?utm_term=tv+guide+st+petersburg+fl In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367281/normal_5f9e2a86581f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450248/normal_5fc7d1e84fb05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370547/normal_5f911be53a878.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394071/normal_5fbc904631dd4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366660/normal_5fc3e08ac7417.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443598/normal_5fb0248758539.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420239/normal_5fad3e5ac8917.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/subud/zepumamomavinadagisopit.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc7a3b0a190b16b315946c/t/5fdce651eff8bd0e767b40bf/1608312401934/cpt_fluoroscopic_guided_hip_injection.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d785085bf90c0efcc6ad/t/5fc31c14a97599144e5e3eb5/1606622234723/rezatazekerunuvosu.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/aptoide_apk_free_for_mi_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/78645662469.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc30d46116eb00e3c59ffbc/t/5fcb801f1880ce05e84bafde/1607172128666/arctic_wolf_3660_suite_2021.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdcb8173599a867de449200/t/5fdd189047d0141fbc773d70/1608325265180/wotoluzo.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/division_of_fractions_worksheets_with_answers.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_off00016f66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F66 4816 bytes
SHA-256: 01670be6646dc9d20238e4f7d644b994af4b2c02f4bf145fb9fffa5ed65ce7df
font_01_sfnt_off00017fe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17FE2 13468 bytes
SHA-256: 8f5c244de10e9125d9b0868c0c96d64de175234c534c0f9bfcf19d24426bd405
font_02_sfnt_off0001aa89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA89 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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