Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f6a132008e1bb53…

MALICIOUS

PDF

74.1 KB Created: 2021-02-11 18:05:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: c651974c2fffb0b0c24eb5e0be58f22a SHA-1: 8f5d31b71d01564d3d2ddb2261b55d43f36e3b75 SHA-256: 6f6a132008e1bb534f814fe876dbaa45ddb85f3395a51b5a190761c9c5b27685
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains a large number of external links, with one pointing to 'maypoin.ru' and another to a PDF hosted on 'cdn.sqhk.co'. The presence of a PDF_SEO_LINK_FARM heuristic suggests the document's primary purpose is to host a large number of external links, likely for SEO manipulation or to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=play+dead+zed+2+unlimited+ammo PDF link annotation
    • https://cdn.sqhk.co/romumoxoleno/ciiggLG/luwesedizodurevaguv.pdfIn PDF document text
    • https://bogagabav.weebly.com/uploads/1/3/5/3/135305267/39ab9d5.pdfIn PDF document text
    • https://mikedexe.weebly.com/uploads/1/3/1/4/131452733/8863800.pdfIn PDF document text
    • https://rojisubul.weebly.com/uploads/1/3/4/5/134593633/f0c8157.pdfIn PDF document text
    • https://remurefovedelag.weebly.com/uploads/1/3/1/8/131860204/noxesejoboxu_xigenezume.pdfIn PDF document text
    • https://cdn.sqhk.co/dejijadu/NidE8jb/lullaby_songs_for_infants_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kelopifagisu/LkWhjFs/vopotesivosewixebobutili.pdfIn PDF document text
    • https://zemokozovoxepuj.weebly.com/uploads/1/3/0/7/130776726/dawuluragexuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zubata/asus_zenfone_5z_review_android_authority.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/hard_worksheets_for_4th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/elementary_my_dear_watson_worksheet.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_off0000e848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE848 4980 bytes
SHA-256: d993d086ceb94bcab2638ca9ae80a347c2c95b1a0ee09a16b2a2aca7cf1c26b3
font_01_sfnt_off0000f93a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93A 10240 bytes
SHA-256: 29c7f12b45701e451e1808fe2651d10defe4d72781548d79a958ba875d1cca56

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