Malicious PDF — malware analysis report

Static analysis result for SHA-256 460e4ae26db1828c…

MALICIOUS

PDF

71.4 KB Created: 2021-02-22 13:43:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 0b62f3290c8edeb1eb8cf656a5b790d6 SHA-1: d405020bdd7f1103f074eb3e300d6740dfcf4e8c SHA-256: 460e4ae26db1828cd4d3a0d4e5fac6e83e2f4115dbd3ce739097d8c79e5e1975
234 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to link farms and redirectors, indicating a phishing or malware distribution attempt. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly suggest malicious intent. ClamAV also detected this as 'Pdf.Phishing.Trojan'. The document body is heavily obfuscated and unreadable, but the presence of numerous links is the primary indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://crophysi.ru/strik?utm_term=how+to+open+door+on+sigma+spectrum+iv+pump In PDF document text
    • https://cdn.sqhk.co/jerusuxelek/hcgdigc/90374430123.pdfIn PDF document text
    • https://cdn.sqhk.co/wofazexej/c9HXg4o/chicken_invaders_3_mod_apk_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/webuzifinuno/gh1hi4A/80766387026.pdfIn PDF document text
    • https://cdn.sqhk.co/nazopekujavi/OgelsO7/tribal_wars_stats_nl.pdfIn PDF document text
    • https://cdn.sqhk.co/powirafawume/hhheShj/77398866698.pdfIn PDF document text
    • https://sejexogubason.weebly.com/uploads/1/3/1/0/131070030/lutis_pomudafi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467955/normal_600e56ae5d67e.pdfIn PDF document text
    • https://vanazufir.weebly.com/uploads/1/3/2/7/132740694/duwilabigim_teredulizuga.pdfIn PDF document text
    • https://cdn.sqhk.co/dibirolinu/6KLjcgh/skater_xl_mods_how_to_install.pdfIn PDF document text
    • https://cdn.sqhk.co/dinigivo/ljgC3EW/42411131535.pdfIn PDF document text
    • https://cdn.sqhk.co/zedawuzijis/egjhhJT/futezulojafarowi.pdfIn PDF document text
    • https://zefisazivite.weebly.com/uploads/1/3/5/3/135314851/kofin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477637/normal_600d2ba21a216.pdfIn PDF document text
    • https://cdn.sqhk.co/rarinuva/hbQShjX/spanish_word_of_the_day_joke.pdfIn PDF document text
    • https://lobavasato.weebly.com/uploads/1/3/1/4/131483685/xevesozazavi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472495/normal_5fffb2d27d000.pdfIn PDF document text
    • https://cdn.sqhk.co/nowovadizeb/hdgfqxH/deadfire_fury_druid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375200/normal_600f8cde94cbf.pdfIn PDF document text
    • https://cdn.sqhk.co/jevamivuvugi/dggZLlm/jibopexajadipixedipike.pdfIn PDF document text
    • https://cdn.sqhk.co/rinugezig/gjjepih/2408189882.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477183/normal_60335ad09a61b.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_off0000d88a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88A 5476 bytes
SHA-256: 6195b0e53a0e636444e464a9631f1cefff6e8c2bd51e1a20a6ff59e370e6f55b
font_01_sfnt_off0000eb23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB23 11052 bytes
SHA-256: 08afebf981abb477833d25db75876739d8716a9f43bc993786fc7304f057df9d

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