Malicious PDF — malware analysis report

Static analysis result for SHA-256 419ea968a1935d1e…

MALICIOUS

PDF

39.5 KB Created: 2020-06-10 09:45:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: 7dc16d01d0b9de8b764add30b2e76209 SHA-1: a4c9aad8a080eb565f50ae15d5fa25d595830151 SHA-256: 419ea968a1935d1e0d77d87d0d1cf0557ef7f79839dda36290cafe674903c895
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or redirection scheme. The primary URL found in the document body also leads to a similar structure. This pattern is often used to manipulate search engine rankings or to distribute malicious content through a network of compromised or controlled sites.

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://paiguojirishishalong.br3h.com/uploads/1/3/1/4/131408082/131408082.html#exerc%25C3%25ADcios+sobre+ora%25C3%25A7%25C3%25B5es+subordinadas+adverbiais+com+tirinhas+e+gabarito PDF link annotation
    • http://leodelmar.com/uploads/1/3/1/6/131606947/xokolibemalaxoboxot.pdfIn PDF document text
    • http://kimsuebee.com/uploads/1/3/0/2/130289748/vewusanoz.pdfIn PDF document text
    • http://romitkumar.com/uploads/1/3/1/0/131070246/2060783.pdfIn PDF document text
    • http://terranostralands.com/uploads/1/3/1/4/131482957/bolegepe.pdfIn PDF document text
    • http://addinginsight.com/uploads/1/3/0/6/130621464/2055926.pdfIn PDF document text
    • http://thecrossinglive.net/uploads/1/3/0/6/130620544/jafamiwifogu_jaxutaxux_paduzujabot.pdfIn PDF document text
    • http://carpetlands.com/uploads/1/3/0/7/130776249/3225f84ec57.pdfIn PDF document text
    • http://sirneil.com/uploads/1/3/0/3/130379814/bodawu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://zipovakolo364097725.files.wordpress.com/2020/06/dopanesi.pdfIn PDF document text
    • https://bitamubopin.files.wordpress.com/2020/06/mufapewu.pdfIn PDF document text
    • https://woniwefis.files.wordpress.com/2020/06/64949409633.pdfIn PDF document text
    • https://pawelulewo.files.wordpress.com/2020/06/xumupalajomugijona.pdfIn PDF document text
    • https://ritiduka.files.wordpress.com/2020/06/toxijotafukajupazew.pdfIn PDF document text
    • https://sojobumowoz.files.wordpress.com/2020/06/pezanut.pdfIn PDF document text
    • https://genomulure.files.wordpress.com/2020/06/venuvokenizifuwowotix.pdfIn PDF document text
    • https://nodexopogigo.files.wordpress.com/2020/06/38667523273.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_off0000670c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x670C 12848 bytes
SHA-256: 2ab9f9cded50c4831c4ccd70170346e7b7e1d7d695a72c7670b6c3623e8c74cd

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