Malicious PDF — malware analysis report

Static analysis result for SHA-256 27be73314a1b7fe9…

MALICIOUS

PDF

93.0 KB Created: 2021-02-05 02:14:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 44dee7cf8d9d116d3048492305e8ccd1 SHA-1: c52c4e43baeed99e8cb9b459bb0fe6ac1b834ccb SHA-256: 27be73314a1b7fe9bc6d30cfd4f634ac9cadd4a344feba9354aa8d507b1f0a76
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, indicating a link farm or content distribution network. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/123?utm_term=past+tense+of+sew+clothes PDF link annotation
    • https://bilujadaju.weebly.com/uploads/1/3/4/7/134772480/gejerolofunofave.pdfIn PDF document text
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/6760823.pdfIn PDF document text
    • https://pegigisujojefuf.weebly.com/uploads/1/3/1/4/131413718/3029836.pdfIn PDF document text
    • https://lemefiware.weebly.com/uploads/1/3/4/0/134017231/4049686.pdfIn PDF document text
    • https://mituzeru.weebly.com/uploads/1/3/2/6/132681412/5b48e833200.pdfIn PDF document text
    • http://exemplpusj.com/xukapudu3zdhr.pdfIn PDF document text
    • http://dragonflysagewellness.com/sugar_maple_growing_guideb8f9d.pdfIn PDF document text
    • https://xemibunadagom.weebly.com/uploads/1/3/4/6/134639404/e3b3a.pdfIn PDF document text
    • http://supportcopyright.net/fusedoxuwewusodig714z.pdfIn PDF document text
    • https://zukaxopukij.weebly.com/uploads/1/3/1/1/131164552/8570965.pdfIn PDF document text
    • https://regujimupakuve.weebly.com/uploads/1/3/5/3/135348903/xovetezofe_dikepebozoxabe_rerib_tamata.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bufipevuril/email_writing_formal_and_informal.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/auto_clear_cache_chrome_android.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/girl_attitude_wallpaper_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/free_app_call_recorder.pdfIn PDF document text
    • http://filamejukak.epizy.com/70947983271.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/24367897663.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11415 4708 bytes
SHA-256: b667942f85ad250b9e11f00228210ac16c336778b91f8b4b545d31027515ac50
font_01_sfnt_off0001241f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1241F 17464 bytes
SHA-256: 04379b5a666fdd7fb586e5cf9297b96a9ea174c3b31efbcca6db5a3b8d17a2a8
font_02_sfnt_off0001589f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1589F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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