Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7487b6cf4aa4754…

MALICIOUS

PDF

74.5 KB Created: 2021-02-28 23:01:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b1391326b5aa7a5390f8c5d5031a82a5 SHA-1: 145e83c19c0e471ce7758a1b31481f6964070a27 SHA-256: a7487b6cf4aa4754bc4c671d3acaa45c6cc2bcaeb47a12d897869e2b248a603a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pelibifir.ru/123?utm_term=words+that+start+with+dictionary PDF link annotation
    • http://mavito.online/what_does_it_mean_to_spread_the_news_contributorgrw9a.pdfIn PDF document text
    • http://olivamebel.com/5283164169911r2d.pdfIn PDF document text
    • https://cdn.sqhk.co/jufebarur/hj3jhhb/formula_atlantic_4age_parts.pdfIn PDF document text
    • http://afracheat4.xyz/vipumarawaxorepugagagasit0ypf.pdfIn PDF document text
    • http://rubisteq.online/best_physical_science_book_for_class_10_wbbse8yltm.pdfIn PDF document text
    • http://dosaxixapaxa.medianewsonline.com/gupojuv.pdfIn PDF document text
    • http://citimart.online/wow_classic_mining_guide_ironktjbm.pdfIn PDF document text
    • http://reform-st.ru/wetatemoxonoxoxologolezsoh8.pdfIn PDF document text
    • https://cdn.sqhk.co/tedigedubemi/RGjibHx/86525053617.pdfIn PDF document text
    • http://copyrightshelpcenter.com/taruvowajotazuse92188.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/iHhg2ib/minesweeper_download_unblocked.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/how_to_make_money_in_stocks_with_little_money.pdfIn PDF document text
    • http://nesobaka9.xyz/the_royal_ranger_the_missing_prince_rangers_apprentice8kkva.pdfIn PDF document text
    • https://cdn.sqhk.co/zidezofa/hidjigf/mapekax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e6cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CB 5204 bytes
SHA-256: 2610bbca30fc64cac98b6f7b4cb9ff69c9d88f20ae2c2c39f470e61e832eea72
font_01_sfnt_off0000f890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF890 10592 bytes
SHA-256: 62b4c415fd182eab44e93c73276fbab23dbcc9da53f926dd03529e94157eaa61

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