Malicious PDF — malware analysis report

Static analysis result for SHA-256 48205b8d7d3dc753…

MALICIOUS

PDF

172.1 KB Created: 2021-03-31 23:43:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a098c6ee42aa0437f157ab356100330f SHA-1: 23cd815f23ea0a58f7eeb7cf50cf1d848effd644 SHA-256: 48205b8d7d3dc753208182e73f931e13ab4334281623c08eba7940d0c747874d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/123?utm_term=anycast+m2+plus+%25E4%25BD%25BF%25E3%2581%2584%25E6%2596%25B9+android PDF link annotation
    • http://fisareboveda.getenjoyment.net/xorukoxatuvazono.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419195/normal_603da31e731da.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/how_to_put_baby_in_graco_snugride_35.pdfIn PDF document text
    • http://online-bestshop.xyz/29675155457q7yx7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384821/normal_603fa96d02288.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/hjkgcAl/free_fire_song_ringtone_download_dj.pdfIn PDF document text
    • http://fastpysystem.online/lukezisagomasogovorsda1y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423750/normal_601fc3625db46.pdfIn PDF document text
    • http://jovopomutulilo.medianewsonline.com/gatimeno.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuwutitaw/iAaQhdQ/highway_to_heaven_song_lyrics.pdfIn PDF document text
    • http://stavki-na-sport.site/czytanie_ze_zrozumieniem_angielski_b84z89.pdfIn PDF document text
    • http://zyzycheat8.xyz/what_does_chemical_weathering_mean_dictionaryhaasm.pdfIn PDF document text
    • http://beach-fruit.fun/429385184179ujz7.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/vexeliku/74843402144.pdfIn PDF document text
    • http://motiwop.rf.gd/baben.pdfIn PDF document text
    • http://vemireme.epizy.com/the_sparrow_by_mary_doria_russell_movie.pdfIn PDF document text
    • http://pareruwawetis.rf.gd/substation_checklist_form.pdfIn PDF document text
    • http://torejejowomu.myartsonline.com/basic_definitions_in_chemistry.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/crystal_report_for_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/tatosuz.pdfIn PDF document text
    • http://reniwen.rf.gd/el_dador_de_recuerdos_online_espaol_latino.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_off0000ed44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED44 117456 bytes
SHA-256: b8054831d90b69ee14c20b4dc6ae7eeb1433f86016e3e566d25dc3cb6b5fe072
font_01_sfnt_off000246fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x246FD 3512 bytes
SHA-256: 6cc4ef0ddbf3e056ef2c43c913c6370a9f40d234a206a9824b7d34da40df0be8
font_02_sfnt_off00025386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25386 5444 bytes
SHA-256: 7ea0984208871e24e53ced6d99e6d40a193fe30e57c47135cfb56189f5efe395
font_03_sfnt_off00026601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26601 10200 bytes
SHA-256: 2b72147cc2c683f390059376b2e3460ba2f1291754097c372653edf8352c7c6f
font_04_sfnt_off00028901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28901 16220 bytes
SHA-256: 0de0daea690cd97bd5402afaaacb445fac3aa770f186c09a87af6b1560f4348e

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