Malicious PDF — malware analysis report

Static analysis result for SHA-256 93dfb750254b9f95…

MALICIOUS

PDF

71.5 KB Created: 2021-02-24 14:42:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: dc2145b09bfb9b85c47c78bc9ccd031f SHA-1: fc611007ada87897728802e2ab791418916d6a9b SHA-256: 93dfb750254b9f9516a3984a9da8b7f24f07b737ddbac40d38b46874af40b24b
154 Risk Score

Malware Insights

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

The file is a PDF containing a link to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were extracted, the presence of a malicious URL is a high-priority indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/aws?utm_term=audio+technica+at-lp60bt+pairing In PDF document text
    • https://cdn.sqhk.co/fexejikexew/jayNghJ/85052668138.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371240/normal_5ff75c97a949e.pdfIn PDF document text
    • http://sejapamuji.22web.org/48359763535.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456165/normal_5fc87f315c310.pdfIn PDF document text
    • https://cdn.sqhk.co/dofofoziga/pEgiigf/64761882898.pdfIn PDF document text
    • https://cdn.sqhk.co/fekigimuzib/3dXifS3/pazuzejifesafinofikovemu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481834/normal_602afe0f089e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425235/normal_60270e3a331f3.pdfIn PDF document text
    • https://cdn.sqhk.co/bajipugotox/tgcichh/parchisi_star_online_gameberry_labs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470979/normal_5fc59bb6c6c9b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mudozegiviw.epizy.com/format_sd_card_ubuntu_16._04.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/92927486931.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/sex_offender_registry_vancouver.pdfIn PDF document text
    • http://vemewef.rf.gd/gelawetoluzomiwefasetomen.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/xununigumixokeripovumok.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/identifying_nouns_worksheet_k12reader.pdfIn PDF document text
    • http://nilovumilof.epizy.com/why_is_my_diffuser_light_blinking.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/google_analytics_for_beginners_assessment_3_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/xuxatudaj.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_off0000d802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD802 5616 bytes
SHA-256: 456bf796fa7a6b0f3d13febac5ea45a934f86fb2a01ac507ca8925a939c77621
font_01_sfnt_off0000eb0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0F 10720 bytes
SHA-256: 3061643568ca3bedb8bc677e2d54c286a3615c1387bb7fbd3fe8c3430698eb5f

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