Malicious PDF — malware analysis report

Static analysis result for SHA-256 454aff745ba9d05f…

MALICIOUS

PDF

37.2 KB Created: 2020-06-07 20:45:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 3cc3fc936250d7930bc62f6b44ea14c6 SHA-1: 0d0142005ad3a8c51a7040cf7538024460b16433 SHA-256: 454aff745ba9d05fb5dd057bdc3ea8d128f1d5c192912f776ab69656fe4611dd
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body, though partially corrupted, suggests educational content, likely a lure to disguise the malicious intent. The primary goal appears to be directing users to these external sites, which are likely hosting malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 http://hailifangbailigongyulecheng.br3h.com/uploads/1/3/1/4/131452976/131452976.html#exercicios+frase+ora%25C3%25A7%25C3%25A3o+e+periodo+ensino+m%25C3%25A9dio+com+gabarito PDF link annotation
    • http://sashacuff.com/uploads/1/3/1/3/131380440/bijirukew_zegiwasal.pdfIn PDF document text
    • http://sodarncuteembroideryandcrafts.com/uploads/1/3/0/6/130604309/litutetuloxofe.pdfIn PDF document text
    • http://cpanel.subudbooks.com/uploads/1/3/0/4/130488398/4282f4f7b.pdfIn PDF document text
    • http://livepresencemanagement.com/uploads/1/3/0/8/130874674/576fe4.pdfIn PDF document text
    • http://newbethellg.com/uploads/1/3/1/6/131607662/7843334.pdfIn PDF document text
    • http://efficacycommunications.com.au/uploads/1/3/0/6/130605270/sixogavolisenev.pdfIn PDF document text
    • http://oldnumberone.com/uploads/1/3/0/8/130814675/d8f4b18.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://navurigafevu.files.wordpress.com/2020/06/wobefunawatad.pdfIn PDF document text
    • https://dakarezuk725273686.files.wordpress.com/2020/06/rulefiza.pdfIn PDF document text
    • https://fowemagafob.files.wordpress.com/2020/06/50355566172.pdfIn PDF document text
    • https://gukubulori.files.wordpress.com/2020/06/jidogajufejumaz.pdfIn PDF document text
    • https://xipewatataz458399044.files.wordpress.com/2020/06/dawejetodaxuzewop.pdfIn PDF document text
    • https://fazupisis.files.wordpress.com/2020/06/noxal.pdfIn PDF document text
    • https://kimetaduwun.files.wordpress.com/2020/06/52548550942.pdfIn PDF document text
    • https://vowitinux.files.wordpress.com/2020/06/vowaga.pdfIn PDF document text
    • https://mubupemigiv.files.wordpress.com/2020/06/77338353918.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

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000620f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x620F 11360 bytes
SHA-256: 2f785ab66697fc053b92fff85fd9a2c80f816abea252cfef5c8346b629455a81

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