Malicious PDF — malware analysis report

Static analysis result for SHA-256 6456ca06965434c0…

MALICIOUS

PDF

40.4 KB Created: 2020-06-04 09:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f797dd2448ee52f8637d34b2cb3e086 SHA-1: 1d376626a062c5960b7d641c635eeff5dbcdd0f5 SHA-256: 6456ca06965434c06666110cadad4bef9861f68db09b24788fd8e82aafe15a93
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified as a link farm. The primary URL, http://howellemploymentsvs.com/uploads/1/3/0/5/130589413/130589413.html#2019+new+pornstars, suggests a lure or content redirection. While no scripts were explicitly extracted, the heuristic PDF_SEO_LINK_FARM indicates a deliberate attempt to create a large number of outbound links, likely to manipulate search engine results or host malicious content on the linked domains.

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://howellemploymentsvs.com/uploads/1/3/0/5/130589413/130589413.html#2019+new+pornstars
    • http://christcapital.com/uploads/1/3/0/7/130775373/5949176.pdf
    • http://gtmobileautorepair.net/uploads/1/3/0/7/130738503/wezejazux.pdf
    • http://fastparcel.net/uploads/1/3/1/3/131383942/4869670.pdf
    • http://etymologyofdeath.com/uploads/1/3/1/8/131856427/vamuretiposofuduk.pdf
    • http://jeanbstein-llc.com/uploads/1/3/0/4/130476597/053f5f.pdf
    • http://shop.hellomodest.com/uploads/1/3/1/3/131398004/xunezedanalelaferere.pdf
    • http://hostmaster.valiszka.com/uploads/1/3/0/6/130639922/bb5ccdb150cc4.pdf
    • http://iamcultured.shop/uploads/1/3/1/0/131071067/welowux.pdf
    • http://howellemploymentsvs.com/uploads/1/3/0/5/130589413/terms.html
    • http://howellemploymentsvs.com/uploads/1/3/0/5/130589413/dmca.html
    • http://howellemploymentsvs.com/uploads/1/3/0/5/130589413/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feguxatejixe.files.wordpress.com/2020/06/27315438925.pdf
    • https://mepizirule.files.wordpress.com/2020/06/89756169805.pdf
    • https://pelimude.files.wordpress.com/2020/06/xifalenixopujurekod.pdf
    • https://gosimepubim.files.wordpress.com/2020/06/fuvofisuzegosuta.pdf
    • https://marexoxudu.files.wordpress.com/2020/06/jikudepoz.pdf
    • https://nevujulanodu997346256.files.wordpress.com/2020/06/texazojubuxarowemubumap.pdf
    • https://julabifefo633366968.files.wordpress.com/2020/06/48572133741.pdf
    • https://pegarosume.files.wordpress.com/2020/06/12541823582.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071f2.bin
94c6dbac4d3c7e17d6a8be5d9c15187184130d4d82e60e4cc6f5b72b71594e1a
pdf-font-stream PDF embedded font (sfnt) at offset 0x71F2 10388 bytes