Malicious PDF — malware analysis report

Static analysis result for SHA-256 df658aad868dc8c1…

MALICIOUS

PDF

73.1 KB Created: 2021-04-02 15:11:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 7a9a46ff42cd4bf7e5733a040aa8c391 SHA-1: 071f5d02776d257d320440a1440b0fa62aa993b4 SHA-256: df658aad868dc8c19966e468b4260e166aafaf433fe4b44b2bf455fdba771606
244 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as malicious, including a link farm and a redirector to known malicious infrastructure. The presence of numerous external links, many on disposable domains, suggests an attempt to lure users to external sites. While no scripts were extracted, the PDF structure and link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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 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.
  • 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/wix?keyword=front+range+boxing+academy In PDF document text
    • http://duvejajenivogik.getenjoyment.net/xufekunajogovusibadepamip.pdfIn PDF document text
    • http://kononameve.mywebcommunity.org/priere_tres_puissante_pour_attirer_l_argent.pdfIn PDF document text
    • http://fragcups.com/bansal_classes_notes8ablx.pdfIn PDF document text
    • http://igcopyrightclient.com/what_two_rivers_flow_north_in_the_united_stateswwc4o.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387933/normal_5feb95dbe5e85.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475739/normal_60077704ec20c.pdfIn PDF document text
    • http://faceit.su/nulejugotodadn4muc.pdfIn PDF document text
    • http://jedusajinud.mygamesonline.org/ts_16949__iatf_16949_comparison.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388279/normal_5fd779d8081bb.pdfIn PDF document text
    • http://tebafurunaxinuj.getenjoyment.net/wozegi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492892/normal_60029b6bc827f.pdfIn PDF document text
    • http://power-guard.shop/mafalda_tiras_completasnah7l.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425483/normal_5ff325ce7b5ad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9931647-9ccb-4296-a506-96b5bf311678/mors_kochanski_northern_bushcraft.pdfIn PDF document text
    • https://3e80c8bf-0031-4ca1-bfa9-4484641fefed.filesusr.com/ugd/08103e_cca1d079c7f84db1baed68e50e795233.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/125718e2-dbd5-4a55-8b0f-6cd5de62ec33/flowers_in_the_attic_lifetime_movie_series_in_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a26222e-fd1f-4384-8202-0a61558e8569/fukokekovoxojetadavog.pdfIn PDF document text
    • https://736f3f86-ac4a-4d06-be6b-3320275ea8ee.filesusr.com/ugd/cd27d0_93b3b9c685314bd6aa558767939bc406.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/532e10f6-4825-4b5b-af49-4392d50e51d1/titabenowugerukabosavame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bf532b9-2a4c-42bc-bbcf-aaf82d87c18a/realtek_hd_audio_driver_windows_7_ultimate_64_bit.pdfIn PDF document text
    • https://562c2315-396f-49d1-9e45-1236e049cb13.filesusr.com/ugd/ec0012_ad4911174d364cc2b9d4064194d7eac6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c304dc7d-a8b2-4a26-95be-16ca9eca4d49/genie_powermax_1500_no_power.pdfIn PDF document text
    • https://98748e4b-3258-471a-903e-8ea98415cca0.filesusr.com/ugd/fd7405_c5107b539c604b408786070246c9251d.pdf?index=trueIn PDF document text
    • http://titugol.atwebpages.com/pdf_to_dwg_in_autocad_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7225f66-70a2-4bc5-a038-acea672ce6a5/nelemopedixexedi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd21e73c-b861-45c4-afed-54f8279c0e82/the_kid_who_ran_for_president_synopsis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc1a16c1-7b66-43b6-a8cb-976d0402d622/vulumenivos.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_off0000de65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE65 5312 bytes
SHA-256: 84980c38d1e2aafd3ddb0362f089cb79e9793ec18d0a52ca61ad9820c9569ed7
font_01_sfnt_off0000f070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF070 10992 bytes
SHA-256: e465b2baf8605160b5944bb16ba49b66a2d1595d128b9773582ff217a4375920