Malicious PDF — malware analysis report

Static analysis result for SHA-256 142c380f04a94496…

MALICIOUS

PDF

79.4 KB Created: 2020-12-20 22:10:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: af53b36fcface4d92d1b1f02af85f68f SHA-1: 21682b92e7d1b3e2566343dcf90f2f59acaeb534 SHA-256: 142c380f04a94496deb704dca88e7b8db70354908704290d99e7e7c68d31f8d1
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The primary URL, 'https://traffnew.ru/strik?utm_term=save+the+best+for+last+movie', indicates a potential attempt to lure users under the guise of movie-related content, possibly for SEO manipulation or to direct them to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • 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://traffnew.ru/strik?utm_term=save+the+best+for+last+movie PDF link annotation
    • https://dudakodut.weebly.com/uploads/1/3/4/4/134497067/9820049.pdfIn PDF document text
    • https://tozijaletaxe.weebly.com/uploads/1/3/4/3/134312516/3106963.pdfIn PDF document text
    • https://subilitukufune.weebly.com/uploads/1/3/4/6/134629352/0a0326c.pdfIn PDF document text
    • https://wivixape.weebly.com/uploads/1/3/4/8/134897282/nulizotevazut_kuzopupusixabu_jidexuwi_dasakeler.pdfIn PDF document text
    • https://xusawoji.weebly.com/uploads/1/3/0/7/130739635/rudud-sugego-neludasovilobox.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://uploads.strikinglycdn.com/files/9cb3698c-442f-4b2f-892a-be8c5a894f14/10331522851.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddd1a924-c6bc-455a-aee7-08dc6af7f20f/78459997024.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcc5e829-1b9f-4723-a54c-5cd52873fa2f/brewster_high_school_new_york.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5aa17e2fce462bcac6d6a/t/5fc8ebb60b7183349bd6b8d0/1607003063075/vupedejotexoxuz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdcb8f07619a53deeff8ff0/t/5fdceb6c621a1d54946a444f/1608313708311/autocad_2016_portable_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/63071837972.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/586efa00-efa1-4187-991c-ac92a03c242d/82463360517.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50518e9fc3622d53c627c/t/5fcd688afe657040d5a56190/1607297163496/jamanomevu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB85 4992 bytes
SHA-256: 08b16f1be31e02e9db38119ac028d4a9f8af13ff518a7b9927290d374636b9f2
font_01_sfnt_off0000dc71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC71 4464 bytes
SHA-256: 4f54352a92aaa3b99c9c4c4c3342a434b83428e9d8b616d2a7e1632936179620
font_02_sfnt_off0000e89b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89B 10696 bytes
SHA-256: 8419a3008418a1a642c818e20b57607d81552f8c863651dbc32a5013df3cf613
font_03_sfnt_off00010d72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D72 16036 bytes
SHA-256: 149cab45689013e99d1aa520d2e5234663aa5d8577b6aae5e423b5d60aeda4c1
font_04_sfnt_off000121da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121DA 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3