Malicious PDF — malware analysis report

Static analysis result for SHA-256 b11ee3c1bb992a9f…

MALICIOUS

PDF

84.6 KB Created: 2021-02-23 07:10:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0a23693fc9e5e347fe08f67c11be6721 SHA-1: 1ad5cc63f69314e2ac4fc1be76fd2eef5aa02cdc SHA-256: b11ee3c1bb992a9ffccb83f3ddf0d10cf9304bdea2910f70a6f2545a59c6d23c
154 Risk Score

Malware Insights

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

The PDF contains an embedded URL that points to a known malicious redirector. Heuristics indicate the PDF is malicious and likely a phishing or trojan delivery mechanism. The ML classifier and ClamAV detection strongly support a malicious classification. The document body, though heavily obfuscated, contains text related to 'Routes of persuasion in communication', suggesting a social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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/123?utm_term=routes+of+persuasion+in+communication In PDF document text
    • https://static.s123-cdn-static.com/uploads/4466996/normal_5ff8655788567.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404745/normal_5ff4acccd4887.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367290/normal_6031e8cb48c0e.pdfIn PDF document text
    • https://cdn.sqhk.co/pegebatanuz/gigcDJk/tiptop_esl_reviews.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417664/normal_6021749fd0f4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449990/normal_6029e0f094532.pdfIn PDF document text
    • https://mizavujubamu.weebly.com/uploads/1/3/0/7/130775062/xiwepalasatomupegul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469617/normal_601b449e3429b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452865/normal_601817285106c.pdfIn PDF document text
    • https://wolapegod.weebly.com/uploads/1/3/0/7/130776073/8555857.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451556/normal_5febc1aeb7b5e.pdfIn PDF document text
    • https://cdn.sqhk.co/xedufoga/oibeHhc/face_mask_art.pdfIn PDF document text
    • https://cdn.sqhk.co/wokinuge/IjbHgNF/14588733229.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457876/normal_5ffd0d77825a6.pdfIn PDF document text
    • https://rojuligu.weebly.com/uploads/1/3/0/9/130969709/suzufeji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468823/normal_5fd2a29fc0306.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378152/normal_6032b0c369faf.pdfIn PDF document text
    • https://cdn.sqhk.co/xusopusavo/idggihP/uncle_joey_cut_it_out_meme.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480582/normal_5fe49c0e71e9d.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
    • 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_off000101fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FB 5020 bytes
SHA-256: 4601746e4d7fe07fd3e720ed2c415aace1acee4849d86c4edaabf5d6960874ab
font_01_sfnt_off000112fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112FB 10536 bytes
SHA-256: a31a19efc24941a66fdfd1993c34b978256c6673a7b011b5c246e3975a6195fe
font_02_sfnt_off000136d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136D4 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

Open this report in the interactive analyzer, or submit your own file for analysis.