Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad850e8f50edda7c…

MALICIOUS

PDF

38.6 KB Created: 2020-06-03 23:32:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cdc783e5528a039ea0200f73fd3080cd SHA-1: b38056c2f2ba7b5fadff2eded254fa27174ca8d0 SHA-256: ad850e8f50edda7c47d192290c21afe6843891dbbc3c404f798505e83e676865
94 Risk Score

Malware Insights

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

The PDF document was flagged by an ML classifier as malicious. It contains a large number of external links, many of which point to PDF files on various domains, indicating a potential link farm or SEO manipulation scheme. One of the extracted URLs, http://lizlepley.co.uk/uploads/1/3/0/5/130539458/130539458.html#bright+and+morning+star+richard+wrig, is also present in the document body.

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://lizlepley.co.uk/uploads/1/3/0/5/130539458/130539458.html#bright+and+morning+star+richard+wrig
    • http://upprimerealty.com/uploads/1/3/0/7/130738777/e8a03.pdf
    • http://wildstrawberrygardens.com/uploads/1/3/0/4/130477346/0e34340.pdf
    • http://mccannfs.info/uploads/1/3/0/3/130379427/570adf.pdf
    • http://smutandbonbons.com/uploads/1/3/0/8/130813533/zavebiwewotedeb.pdf
    • http://osscomp.com/uploads/1/3/0/7/130739533/wusisim_tatokosuji.pdf
    • http://webdisk.skipcoryell.com/uploads/1/3/0/7/130776718/2295120.pdf
    • http://steverat.com/uploads/1/3/0/5/130544067/podabared.pdf
    • http://hecoconstruction.net/uploads/1/3/0/6/130639781/wepolodil.pdf
    • http://winstonsalemkids.com/uploads/1/3/0/6/130622047/8278704.pdf
    • http://georgiacrook.co.uk/uploads/1/3/0/6/130639442/biviriwipabitifuj.pdf
    • http://hub.thefirstgenlounge.com/uploads/1/3/0/5/130551472/7230e435b94.pdf
    • http://acrylic-artist.com/uploads/1/3/1/4/131406281/ginifes-siluviragiw-zabevibelexen.pdf
    • http://cmsa1992.org/uploads/1/3/1/0/131070237/7799849.pdf
    • http://lizlepley.co.uk/uploads/1/3/0/5/130539458/terms.html
    • http://lizlepley.co.uk/uploads/1/3/0/5/130539458/dmca.html
    • http://lizlepley.co.uk/uploads/1/3/0/5/130539458/policy.html
    • https://miserowage857454741.files.wordpress.com/2020/06/63095964108.pdf
    • https://pomigizob.files.wordpress.com/2020/06/garalovo.pdf
    • https://bafapisonosi.files.wordpress.com/2020/06/nojekevamijevi.pdf
    • https://somipejema.files.wordpress.com/2020/06/34384031850.pdf
    • https://rorawet.files.wordpress.com/2020/06/rusiki.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c67.bin
55ea2c66ae13b5a6a60479c7a668d53446f1b2f79b4b9fc20d8d540c8dc9ce9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C67 10120 bytes