Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d4d3bbf43da1d8d…

MALICIOUS

PDF

122.4 KB Created: 2021-04-02 01:34:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: de4212fa2a5057ba9045bd906df203d0 SHA-1: 147a026933bcccf5cc0f92b7eb7e8b75a45cc544 SHA-256: 8d4d3bbf43da1d8df83dcf45640c0c69d18254e9cf364d756403187ef2c5368a
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, indicating a phishing and trojan-like behavior. It contains a large number of external links, forming a link farm hosted on disposable domains, designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, appears to be a lure related to makeup products, attempting to disguise its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://jumiwimov.ru/123?utm_term=makeup+forever+ultra+hd+foundation+shade+guide PDF link annotation
    • http://online-sistem.site/39771742239hdu4n.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486537/normal_5ff54c156ec52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384469/normal_60217824d9822.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421365/normal_603924767e03c.pdfIn PDF document text
    • http://alcexpress1.xyz/kuzojitokegolametimovt6vdv.pdfIn PDF document text
    • http://mailedflkf.site/22187166553qmu5w.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384464/normal_5fdb8ee1a540e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445130/normal_603776d6050fb.pdfIn PDF document text
    • http://formverifiedbadge.com/arcforma_haj_frfii3y05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486758/normal_6041544b2de50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368230/normal_603855cc7bd69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413474/normal_60625483c6a4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459341/normal_605b09bd3b800.pdfIn PDF document text
    • http://umniashka.ru/graco_milestone_manual_uk2yh4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477408/normal_606004316d291.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500444/normal_5ff7a4ff4c31c.pdfIn PDF document text
    • http://alsamcctv.com/free_chunky_yarn_baby_blanket_patternssbx66.pdfIn PDF document text
    • http://winoorama.site/go_fish_poke_bar_locations5u386.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379220/normal_601faf87dfc75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458837/normal_5fd12e5bd98b9.pdfIn PDF document text
    • http://pasendapp.online/zubudawinirolormlr1x.pdfIn PDF document text
    • http://picsonair.com/viewsonic_pjd5155_reviewfyvsn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384143/normal_601b444d1c5eb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f1cb2ec4-a82d-4768-8a06-5236a2db220e.filesusr.com/ugd/a2e20a_67abf3dc99154f68945ad02aadc53c39.pdf?index=trueIn PDF document text
    • https://c6de0af5-2a4c-46da-924c-839bccb102c6.filesusr.com/ugd/5f1f0f_6d5613c12af54fa7a20cc963cc225f3c.pdf?index=trueIn PDF document text
    • https://16e729f2-8c5c-4787-b670-14aeba6c5e03.filesusr.com/ugd/ac55e2_399cafe3ce384d13b276d9da89397cc6.pdf?index=trueIn PDF document text
    • https://11ab4cf5-156d-4417-99e9-5039b2a7eb5f.filesusr.com/ugd/82d61e_3bd0b083792844f2a3999423ad044d04.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0001beba.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1BEBA 18080 bytes
SHA-256: f4ade8a59c9791052b7f7165707bf7249a3b7d0e3d8228c74cc49bba07365f29
font_00_sfnt_off000184aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184AA 5432 bytes
SHA-256: 3a1f0373e34d826bc1f71f8b40e2e66449e02dd48271bd356b844e4283aa1fba
font_01_sfnt_off00019737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19737 11864 bytes
SHA-256: a69d655e673699655d55a2909bcf9f80b7b37a1d054f6b015b5adf39a1c51a20

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