Malicious PDF — malware analysis report

Static analysis result for SHA-256 0846da4efa154922…

MALICIOUS

PDF

80.2 KB Created: 2021-03-20 01:56:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: cccce1b958d9f96f2757de7c04fca52f SHA-1: 688457d066d08c6160099d2397c4b09e1946a57b SHA-256: 0846da4efa15492266d6171025c270de0a73331241f6d0a30f80fe21d6fdbbb6
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many pointing to disposable domains and suspicious PDF files, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95'. The ML classifier also flagged it with high confidence. The embedded URLs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://kuzutuzo.ru/wix?keyword=what%2527s+wrong+with+the+church+today PDF link annotation
    • http://winoorama.website/13323161006c5yg8.pdfIn PDF document text
    • http://janorewaxeno.mygamesonline.org/wisulamitepakemetumalebe.pdfIn PDF document text
    • http://eurostore.info/eba_ders_materyal_kullanm_ilkeleri878iz.pdfIn PDF document text
    • http://galoomer.online/xawazetagulogizotit8750.pdfIn PDF document text
    • http://tomolijoponix.mypressonline.com/is_a_2013_hyundai_sonata_a_good_car.pdfIn PDF document text
    • http://zitaranitu.22web.org/plantronics_c054_connect_to_cell_phone.pdfIn PDF document text
    • http://sravniproxy.info/paguz5xeyv.pdfIn PDF document text
    • http://sebemigon.66ghz.com/49763122327.pdfIn PDF document text
    • http://arthromedshop.xyz/polivokumofej5f8kv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://b2f02272-107b-4032-aafc-54cdd6265a16.filesusr.com/ugd/6cf392_ed1ad7836fe045eb95393f4be7df2621.pdf?index=trueIn PDF document text
    • https://d04c2b29-3777-4fe6-aaa9-ab96f87c3324.filesusr.com/ugd/43eb95_69602053caf445cab9bd6db118d145d8.pdf?index=trueIn PDF document text
    • http://dajatumuba.epizy.com/sharh_aqeedah_tahawiyyah.pdfIn PDF document text
    • https://a84030a7-2e48-4039-807a-383e2b7216cc.filesusr.com/ugd/c5d40f_758550bdc90b4091bbc0481661c98d2f.pdf?index=trueIn PDF document text
    • https://6d428a25-da86-44fa-8f13-5b0f09742281.filesusr.com/ugd/3649d2_7a3e1ca967544b5cad111f7fbc15f614.pdf?index=trueIn PDF document text
    • https://a0f1d9c0-ea46-4e0e-9383-d87711d3127f.filesusr.com/ugd/1e3fb7_30632d3b07594eab8d40f0ea5556b2ab.pdf?index=trueIn PDF document text
    • https://e905a76e-7bc1-418c-be29-e8eda1603e86.filesusr.com/ugd/3fb32a_699d21c1e95342b7967330b8ada13f53.pdf?index=trueIn PDF document text
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_786df3c2999742a4b9907be453ef2637.pdf?index=trueIn PDF document text
    • https://bf130ee1-1463-4c69-9604-1b23772ced92.filesusr.com/ugd/b4609a_7340415a76d14e11aafd965a8c71acb0.pdf?index=trueIn PDF document text
    • https://6ec3981f-6443-463b-a164-91fc69f101d9.filesusr.com/ugd/7603ae_60151b95be754fddb48db157b8691136.pdf?index=trueIn PDF document text
    • http://vubelifijam.atwebpages.com/zewajedipovozasevimox.pdfIn PDF document text
    • https://52b03d57-94e3-497b-b2ee-5a576b8f136c.filesusr.com/ugd/67ae49_12b3f7a3f39c4543b18040761275e37d.pdf?index=trueIn PDF document text
    • http://wuxipiropamamoz.epizy.com/notepad_plugin_jstool.pdfIn PDF document text
    • https://75a697d3-84f0-44cf-bab9-f05e37020c50.filesusr.com/ugd/7c3584_32c020c4361c4a32a63bcc17e671775b.pdf?index=trueIn PDF document text
    • https://b6f97e74-198a-461d-a312-d71b9712332b.filesusr.com/ugd/a2d007_8d140a2b41d346dda45e20df954bd210.pdf?index=trueIn PDF document text
    • https://51bf459c-6b46-41b0-863f-532cf8a77e0d.filesusr.com/ugd/2eedf1_f919075c146045ec95d15b9b2d107060.pdf?index=trueIn PDF document text
    • https://73e25548-3913-4bbb-aa69-a1b25f69568d.filesusr.com/ugd/cece23_8f0e89034fc7442ab3a26e3a3974bc3a.pdf?index=trueIn PDF document text
    • http://luxovas.rf.gd/dj_punjabi_bhangra_songs_free.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_off0000faa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA6 5412 bytes
SHA-256: b4408961615d6e4154b3750e56c23b341945ddc823071711fc949fec6cb4b88e
font_01_sfnt_off00010d27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D27 11188 bytes
SHA-256: 0ae28382a54ce93167598176ec2787a3e88bffe85cb272543890770647c2807a

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