Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dd9c85e76cb18b7…

MALICIOUS

PDF

74.2 KB Created: 2021-03-29 22:30:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3cbea89f484104b3efcbecaca0875aa SHA-1: 9e3a1c4c36b495b96113c6d8cbe329f2a1aff80f SHA-256: 1dd9c85e76cb18b770ee40efa21cf8f1f6434c2a94f0bb430d093db4c0b56719
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, appears to be a lure related to a search query, suggesting a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/strik?utm_term=what+is+binomial+distribution+with+example
    • https://cdn.sqhk.co/fafujedajir/0ieJWhe/dead_space_removed_from_app_store.pdf
    • http://gepokupaburorew.mywebcommunity.org/19906691903.pdf
    • http://wisitens.online/vuzevexosimitijexikopixosxs1l.pdf
    • http://getveran.site/cen_tech_multimeter_battery_replacementyx6uj.pdf
    • https://cdn.sqhk.co/nevupediwix/hcjaThj/nufolelevexamekeruj.pdf
    • http://operationhomeplate.com/furaw673ho.pdf
    • http://grampus-shop.com/fodelafumokusikipojn2d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7834b41e-60b5-46f2-9a37-602d3471dda3/66058011299.pdf
    • https://s3.amazonaws.com/vukujidor/12279053228.pdf
    • https://uploads.strikinglycdn.com/files/a942f929-48ae-4917-8f37-aaac2800e5f8/33945266143.pdf
    • http://vowatul.rf.gd/zidetitoweti.pdf
    • https://uploads.strikinglycdn.com/files/1cfd5ce3-adca-4058-8c9f-833af1b8dcb9/dixiwe.pdf
    • http://lutepotazor.onlinewebshop.net/luwutagubetamuzupafu.pdf
    • https://s3.amazonaws.com/dudigonifu/perfect_complements_examples.pdf
    • https://uploads.strikinglycdn.com/files/19f46367-9bf4-4fc5-b620-7d06f9d681bb/how_to_fix_short_cycling_heater.pdf
    • http://fuvituze.epizy.com/zajofibodo.pdf
    • https://s3.amazonaws.com/sefipa/tarafav.pdf
    • https://s3.amazonaws.com/masevewi/naxagesinabejo.pdf
    • http://gafojokogez.rf.gd/70358842212.pdf
    • http://xasazotim.rf.gd/canciones_catolicas_letras_y_acordes.pdf
    • https://s3.amazonaws.com/rufonali/fesisunilutivole.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0e1.bin
d1b35699872ff8048171271c41c6d60d24f45a8bbc77c36f2b0a6e6cb9d200d8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E1 5512 bytes
font_01_sfnt_off0000f380.bin
145b7a3b4698f9e637b62dcc5e74ba81d5f73b00e30cc60664751694251614e8
pdf-font-stream PDF embedded font (sfnt) at offset 0xF380 11588 bytes