Malicious PDF — malware analysis report

Static analysis result for SHA-256 7274b4026040eeae…

MALICIOUS

PDF

69.7 KB Created: 2021-04-07 16:22:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 52bb8ffa6b4e772e0c9bcccf571e9266 SHA-1: 5eeffedb4baa15929594256dd67b34828fd2ce6b SHA-256: 7274b4026040eeaebb188f68e37aa14fdbb07cd735f3c8ccd6e8c6533553e559
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm hosted on disposable domains and CDNs. The primary external URI points to a URL that mimics a Craigslist search, suggesting a lure for phishing or SEO spam. While no scripts were extracted, the structure and numerous external links indicate a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/wix?keyword=craigslist+dallas+fort+worth+antiques+by+owner PDF link annotation
    • https://cdn.sqhk.co/nukuzulu/jqejhig/84866065905.pdfIn PDF document text
    • https://cdn.sqhk.co/bevizewo/gdgh0if/best_country_songs_of_all_time_download.pdfIn PDF document text
    • https://cdn.sqhk.co/redexisa/iejgVig/miwudolovu.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/dh8PifW/drill_evolved_hack_download.pdfIn PDF document text
    • http://bitasifo.22web.org/76494005033.pdfIn PDF document text
    • https://cdn.sqhk.co/kaxejelun/hg9gOhi/66854541889.pdfIn PDF document text
    • http://wopedejani.iblogger.org/tudonofumasokatopexikil.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/pidufozu/xalawuzukokigefanida.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/death_cure_movie_cast.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/kelvinator_air_conditioner_remote_control_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a19a7cb2-4e04-4886-b3d6-ae795a958e9a/purukesudaxajixogejaga.pdfIn PDF document text
    • http://fafebexa.epizy.com/anti_inflammatory_diet_book.pdfIn PDF document text
    • https://7c9e9c40-2b96-4f88-8065-b5ff5e495659.filesusr.com/ugd/3bfcae_b0acc8d8c2cc4edf86771754546c4297.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lanaladu/42218962494.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb7965fb-b0d9-46d0-befc-f7dfb1e8e592/kedetobugipaj.pdfIn PDF document text
    • https://85ed388a-52e0-4e79-9737-9d4b769dda71.filesusr.com/ugd/bb10c5_de66694e5bef47c99f0129653c278319.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7087d643-08e7-4abb-a773-e31b6b3c1159/gafirikevisegipirode.pdfIn PDF document text
    • http://rajafebinolug.epizy.com/statistical_quality_control_wiley.pdfIn PDF document text
    • https://df9240ce-57b4-430e-a582-521170ca5232.filesusr.com/ugd/10b03a_7f85d1e6f4f84a5f96dd47b857f4787e.pdf?index=trueIn PDF document text
    • https://6f672a44-e16c-4921-a0f1-e3781c0647c5.filesusr.com/ugd/bda22a_8d3a3fb2843b4ed1b6bd5bdc2f007553.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/405fb28b-ed37-4213-9e2a-7ae0e155e5db/one_punch_man_season_2_anime_list.pdfIn PDF document text
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_467c56e22c6b4fcc94cb0e5d60150774.pdf?index=trueIn 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_off0000d14d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD14D 5532 bytes
SHA-256: c68d72de922ec077092b6cfaa349c14bc98e288e3e274c9f2e142d1b829672ac
font_01_sfnt_off0000e41d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41D 10256 bytes
SHA-256: c3f93c9f9535a18164963cc582511f74a84de107afb6cb714e30cfcdb32f8a6a