Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbd915d449cda102…

MALICIOUS

PDF

76.2 KB Created: 2021-03-18 13:13:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: aa9854fa9aff54b3bd5870a94e304c4b SHA-1: c57358cf5c16940704550e56647db1006a75931e SHA-256: fbd915d449cda10223134317e520675ff79f502d74619e0ab2c88c0eb324b99c
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, and one primary URL that appears to be a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a theme related to 'wasting time' and potentially a fake application form, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://mezovuduw.ru/aws?utm_term=what+god+says+about+wasting+time PDF link annotation
    • https://fenemonefozu.weebly.com/uploads/1/3/0/7/130739495/59342a4e5a.pdfIn PDF document text
    • https://kagopibuxewiki.weebly.com/uploads/1/3/1/3/131398156/43ef1.pdfIn PDF document text
    • https://lorufolirosob.weebly.com/uploads/1/3/4/5/134584190/tuleputilenu.pdfIn PDF document text
    • http://depusapo.mypressonline.com/alter_ego_mthode_de_franais_a1_download.pdfIn PDF document text
    • https://ditaluli.weebly.com/uploads/1/3/5/3/135325413/0d15e52fcd2.pdfIn PDF document text
    • http://kozugufasuroti.mygamesonline.org/poxavatakij.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/vebisop/canada_visa_application_form_free.pdfIn PDF document text
    • https://a121017b-3fb3-450c-9156-48dd71a9bf80.filesusr.com/ugd/07625c_f4a9be58d3db4a58a578acaf24b4d0de.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muxegeza/50614196822.pdfIn PDF document text
    • https://7fe1f042-206b-4735-a408-f56337efeeb4.filesusr.com/ugd/d34b51_5ab99ccad9fd4371bf7800313fd57780.pdf?index=trueIn PDF document text
    • https://03aaa7dd-6608-466c-a68c-f41c59811c05.filesusr.com/ugd/ae15ca_fb16b08f0a8d47faa11ca79569311eed.pdf?index=trueIn PDF document text
    • https://40785fcd-1e5e-4316-9306-5db1d5795eae.filesusr.com/ugd/2f07a1_265d9c8b88c74d13b545404ecfc825fd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/literary_terms_worksheet_othello.pdfIn PDF document text
    • https://80c93ba6-74df-4afb-9852-3a83eaba20e3.filesusr.com/ugd/4cf28d_db1703e54ebd47f4aaa7e0e3c0dd259d.pdf?index=trueIn PDF document text
    • https://61df3396-90b5-4b69-a3ae-475c9da6ebc5.filesusr.com/ugd/516574_d81daa81d3ca46559587df913ebff118.pdf?index=trueIn PDF document text
    • https://9a1eab6f-da2d-4a41-99bb-18a59f11b130.filesusr.com/ugd/c2b690_10a64b1e0839468c9ea72539853d4fac.pdf?index=trueIn PDF document text
    • https://07d68bf2-0661-47e2-9ffe-eae068a071af.filesusr.com/ugd/fef806_a4270e1452ef4654b478b8ffcd5fb3f1.pdf?index=trueIn PDF document text
    • https://f37c3615-20b0-4e70-b1e7-2acf34113780.filesusr.com/ugd/1e533a_bc989ada2ef04e59aa5aa70e52d4bf1a.pdf?index=trueIn PDF document text
    • https://f8340159-69ce-4309-ac43-521e9a8475b4.filesusr.com/ugd/bc0b97_2d8c50ca6b1e49ab8994cf25bfb11abc.pdf?index=trueIn PDF document text
    • https://afa032df-bfad-47da-a9c8-c79260182993.filesusr.com/ugd/6f9b04_414600c9409e429da8698a65cef9b265.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/cisco_3850_fiber_switch_datasheet.pdfIn PDF document text
    • https://b66a6cc6-7028-4fd7-9d19-084b2b27c535.filesusr.com/ugd/4015cf_139ec45d3a644b8dbf4e9ab1aff87d72.pdf?index=trueIn PDF document text
    • https://247e77cc-5367-4382-8586-7c5891409f42.filesusr.com/ugd/2dbf5a_15cb28219f8d4988af49518861e49e86.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC32 5456 bytes
SHA-256: bf9a330d5957e680733a39b24453df662b60ac23540b3ca519b82a082fd4bc9d
font_01_sfnt_off0000febb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBB 10836 bytes
SHA-256: 325daf54d3e1ec943760247e3b97ab399d29f4956fc07fc79355d1ec88908912

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