Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8ae9b518b3a38e4…

MALICIOUS

PDF

86.9 KB Created: 2021-02-22 02:02:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c20dc1f9c7b5707f2efcff690547063a SHA-1: a113ebcb88323ed95b74744b2ed70f689e625c6d SHA-256: d8ae9b518b3a38e4af84d3d83c650fb7a8daa6f9122e0ca44cf213ac83e97ae6
96 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a "PDF_SEO_LINK_FARM", indicating it is designed to host numerous external links. The embedded URL and the document body text, which mentions "types of deterrence punishment", suggest a social engineering pretext to drive traffic to these links. While no scripts were directly extracted, the nature of link farms and the presence of external URLs often implies a malicious intent to redirect users to potentially harmful sites or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://jottigo.ru/123?utm_term=types+of+deterrence+punishment PDF link annotation
    • http://zazonowipudu.66ghz.com/xifekimiwagijimukamexuz.pdfIn PDF document text
    • https://gogovujogizog.weebly.com/uploads/1/3/1/6/131607278/jagufugokefiz_jexojule.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/cVthiRB/ice_cream_near_me_open_24_hours.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407983/normal_5fdf72bfec50b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406776/normal_602fa53608878.pdfIn PDF document text
    • https://widowajezow.weebly.com/uploads/1/3/4/5/134584852/060c5c84.pdfIn PDF document text
    • https://cdn.sqhk.co/xobitabab/jdsQlif/30492732536.pdfIn PDF document text
    • https://bokakarepexopo.weebly.com/uploads/1/3/4/7/134750167/jofobo.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/sifawekujiki/13871589996.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/98478364058.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/bowen_s_reaction_series_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/google_bildersuche_bild_hochladen_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/brewmaster_monk_pve_guide_5._4._8.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/68101730967.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/limibokelakenuriwuto.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_off000116c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C4 5204 bytes
SHA-256: 154a17aca22da944210bc23bd99040d626fd2cfd405ba17ae0807e07d8ac760d
font_01_sfnt_off0001285d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1285D 11256 bytes
SHA-256: 62c44bd65cf6b34247e59eed597284af21e5053476e0981775f9f08d96a074e5

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