Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f91d07f42c6cf4c…

MALICIOUS

PDF

75.7 KB Created: 2021-03-28 15:47:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 71aff052a3f1a8cec438bb6601a90d19 SHA-1: 76fa62dd26ae0d99d1e089fcf13ad24b201d5b36 SHA-256: 1f91d07f42c6cf4c8bc8e4608e911a6b9abd6e5ead3699f74804c8a5407ced30
184 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains a search query related to movie downloads, suggesting a lure to entice users to click the malicious link. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

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
  • 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 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.
  • 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://dafemum.ru/strik?utm_term=midnight+sun+movie+songs+free+download In PDF document text
    • https://raxumizagava.weebly.com/uploads/1/3/4/7/134710615/8449142.pdfIn PDF document text
    • https://pakipuxis.weebly.com/uploads/1/3/5/3/135347710/9eedc119f139b08.pdfIn PDF document text
    • http://trysucre.pro/brown_bear_brown_bear_what_do_you_see_coloring_pagesliowx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495241/normal_603b7a95ed023.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488133/normal_600471b675022.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479441/normal_600c01bbc593d.pdfIn PDF document text
    • https://modulofironufi.weebly.com/uploads/1/3/4/4/134402713/fa9ff0d8847dfb.pdfIn PDF document text
    • http://menformula.xyz/454449227752wef4.pdfIn PDF document text
    • http://zixaxagewan.mypressonline.com/89073026711.pdfIn PDF document text
    • http://sadovik.me/diy_painting_kitchen_cabinets_without_sandingcncov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385859/normal_602c18dd2dc05.pdfIn PDF document text
    • https://fixupusojorulu.weebly.com/uploads/1/3/4/4/134438709/dibizagitukegu.pdfIn PDF document text
    • http://vizojuzoninunoz.scienceontheweb.net/swing_check_valve_catalogue.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472185/normal_6009855b0cc76.pdfIn PDF document text
    • http://rojibitakuvekuw.scienceontheweb.net/cartesian_coordinate_system_grade_8.pdfIn PDF document text
    • http://ueuniti.xyz/67936241505twjnd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lososimap/83661583349.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/48394345552.pdfIn PDF document text
    • http://pimimozoji.myartsonline.com/magic_quadrant_for_application_security_testing_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/storytelling_books.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA14 5476 bytes
SHA-256: fdbb87a0f62cb8fa69a16f2c19945e94fe57a35192842e913ed0e287b5fb79f9
font_01_sfnt_off0000fcac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAC 10684 bytes
SHA-256: 2ff6045fa2c92e8223ffca63451b80dcba5aafb901ff96e8ef712ff1f37e68b9

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