Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a85325de01e0534…

MALICIOUS

PDF

84.5 KB Created: 2021-02-02 20:47:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 1c0c5e84a82e62107263d6fe6957d0d7 SHA-1: c00760dc68aba7ce76f2e373116b6086c010dadb SHA-256: 9a85325de01e05347f203ef34f589d6fdcc955b32fc384f1f329902a49e25e75
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, and is flagged by ML classifiers and ClamAV as malicious. The document body, though partially corrupted, suggests a lure related to WordPress page rearrangement. The presence of many external URLs, including those hosted on Weebly and sqhk.co, indicates a likely attempt to redirect users to malicious sites for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://druttle.ru/123?utm_term=rearrange+pages+in+wordpress PDF link annotation
    • https://kokezixunilo.weebly.com/uploads/1/3/4/0/134096179/mofebetibopu.pdfIn PDF document text
    • https://cdn.sqhk.co/vukupamita/ejjh6jc/33859336947.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485807/normal_5fe0d97a121e2.pdfIn PDF document text
    • https://kiwotatuna.weebly.com/uploads/1/3/1/8/131856308/0f76444cc.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxatotukaru/hejchhx/musobinimuko.pdfIn PDF document text
    • https://cdn.sqhk.co/sujutowupolu/i4VhbAf/my_ghost_girlfriend_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/fomezawelud/ejeiizk/58050515334.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/mujesogi/raa_negra_25_anos_cd_completo.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/49953491271.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/72144802516.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/bhagavad_gita_free_in_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/30452447406.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/outlook_attachments_from_multiple_emails.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C3 4904 bytes
SHA-256: e920b2553a1f9ae517ea39d5cc635f6f72d41e6089aa1173bb4534a5ffd62707
font_01_sfnt_off0001087b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1087B 1796 bytes
SHA-256: dfab3945eace5ba27be1ad95d63d5142397767eab6bca27773794b33bda2302c
font_02_sfnt_off00011105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11105 11168 bytes
SHA-256: 343f101e9345f64af0eb817a34a176505e1372b5a08234fd1b9f2fe0b00fbbe7
font_03_sfnt_off000136c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136C2 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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