Malicious PDF — malware analysis report

Static analysis result for SHA-256 d70025f4280130d3…

MALICIOUS

PDF

76.7 KB Created: 2021-04-06 09:59:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 102be571a36269a392e2c2bf1826829b SHA-1: 58154a4bd50d075cfa3e435d006a32c1248dec19 SHA-256: d70025f4280130d3185c67b323dc2879b8d5bcae9ef33ed1b2240b1e55f75fd4
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a PDF link farm, suggesting a tactic to manipulate search engine results or redirect users to malicious sites. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly indicated maliciousness. While no scripts were extracted, the presence of numerous URLs and the link farm heuristic point towards a phishing or content-serving malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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.
  • 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://druttle.ru/award?keyword=endoscopia+procedimiento+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4490757/normal_5ffca08fed4d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443371/normal_602d08f5d09b9.pdfIn PDF document text
    • http://zasigugela.iblogger.org/bived.pdfIn PDF document text
    • http://job-finder.space/65291859308p0k94.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://persequen.com/90308654647aikr9.pdfIn PDF document text
    • http://atlas-copco.su/asus_rt-ac66u_firmware_tomato7lx9t.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vubalek.epizy.com/dimerofiwagezezot.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/kegolosofoteg.pdfIn PDF document text
    • https://627f215e-41ba-4aa4-9906-5f9f9d117739.filesusr.com/ugd/8ab72e_cab3b4de1d234d5db4c370e200f6b7e5.pdf?index=trueIn PDF document text
    • https://e60c805d-b9e1-47fc-b045-983511e9ac1f.filesusr.com/ugd/116bb2_61ce96ce97dd4838acfdca7d0f4593db.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/anti_ragging_form_for_pg_students.pdfIn PDF document text
    • http://famigobefil.epizy.com/ligufewojes.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/dell_monitor_2007fp_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/buxakuvagerotaj.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/96414898074.pdfIn PDF document text
    • https://08202b68-adf4-4b7d-bb06-fcebe54c78b8.filesusr.com/ugd/76dd3d_f79270c397c24aeda4de308d677c3ef0.pdf?index=trueIn PDF document text
    • http://nutukame.rf.gd/jidunonalimafas.pdfIn PDF document text
    • https://5a995288-ce6f-4ae3-a3e6-14272d8003db.filesusr.com/ugd/7be1cd_9fd3f035b4a14708be572732e189e6ca.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/aadhaar_update_form_address.pdfIn PDF document text
    • https://493f174a-a540-412c-bacb-e5b7b26cbfcf.filesusr.com/ugd/95bb70_01825efbf29a41a88b9cdb540b2427b4.pdf?index=trueIn PDF document text
    • http://nimobavaze.epizy.com/judukekilegidogux.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/handwriting_without_tears_letter_formation_cues.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
    • https://medlineplus.gov/spanish/endoscopy.htmlIn 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_off0000ec91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC91 5228 bytes
SHA-256: fe3ec73d95dc5a15e146b58214f2e872cb8d31c1ca0edbc7db2754841bcf20f7
font_01_sfnt_off0000fe4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4A 11596 bytes
SHA-256: 43af775dc870fb01bb12f0bb7513528c8121cfe0d7e4f810f85827cef466ccbe

Open this report in the interactive analyzer, or submit your own file for analysis.