Malicious PDF — malware analysis report

Static analysis result for SHA-256 56eff8a3efde296a…

MALICIOUS

PDF

71.5 KB Created: 2021-02-25 09:52:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3e38d48ec2501473cedcd91aed655bef SHA-1: d92d7c442632b3c5dbc776e08586e044901ba4d6 SHA-256: 56eff8a3efde296a4facd606fa61225d0ac899845c93399c2041c50ac2254f12
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to various domains, many of which are associated with link farms and disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of this document being used for phishing or malware distribution by presenting itself as a search result. The ML classifier and ClamAV detection strongly support its malicious nature.

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
  • 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://leonvi.ru/wb?keyword=how%20to%20genie%20garage%20door%20openers%20programming PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489981/normal_601e0800e0b58.pdfIn PDF document text
    • https://wamexololizod.weebly.com/uploads/1/3/2/7/132712163/faziw_dejakolujevu.pdfIn PDF document text
    • http://hotel-engels.ru/charlie_bgm_isaiminio7hmr.pdfIn PDF document text
    • http://nejevefivi.mypressonline.com/45777341645.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/how_to_scan_any_barcode.pdfIn PDF document text
    • https://sukesiguwote.weebly.com/uploads/1/3/4/1/134132294/modosiman-lewiporef-birojefufen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376875/normal_5fcb25cad98af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4859805/normal_6035b5147c3cf.pdfIn PDF document text
    • http://chambrehq.xyz/price_of_generac_power_celliln0p.pdfIn PDF document text
    • https://funujitumim.weebly.com/uploads/1/3/5/3/135347265/39f205e790d9d7.pdfIn PDF document text
    • https://rupogasonewu.weebly.com/uploads/1/3/4/6/134653860/9916173.pdfIn PDF document text
    • http://copyright-securityx.com/acorde_a9_violoby97f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454043/normal_5fc7d764ab97d.pdfIn PDF document text
    • https://vaxatimiroxak.weebly.com/uploads/1/3/4/6/134617636/4496564.pdfIn PDF document text
    • https://vumopofusub.weebly.com/uploads/1/3/0/8/130874587/5473109.pdfIn PDF document text
    • http://esmoney.site/what_is_the_main_point_of_the_sisyphus_mythauh2n.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
    • http://jokosen.atwebpages.com/is_the_spy_museum_in_dc_worth_it.pdfIn PDF document text
    • http://livirava.atwebpages.com/95862023073.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/english_grammar_book.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/what_does_the_meaning_of_like_water_for_chocolate.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF82 5088 bytes
SHA-256: fb78da656a7e3351c01744e80b89d13cae201292057b8031586371d0d4cfcb87
font_01_sfnt_off0000e0c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C4 9732 bytes
SHA-256: 032954e14d1a1812833a04f6398cd176fb42dcc2d0d414561302bf47d2da0a63
font_02_sfnt_off00010217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10217 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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