PDF malware analysis — malicious · 854d1e58aa4331f2

MALICIOUS

PDF

57.1 KB Created: 2020-06-09 06:59:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 304d9e936c3cdca21fe19adb3fe95f7a SHA-1: 64be0e3f7591e76d44fe52d2e69accc0dad0b686 SHA-256: 854d1e58aa4331f28022b9e0cd4c62bb2e1e200996b0f3f0dc571a7cb6fb0fc0

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links to other PDF files hosted across various domains, indicating a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves luring users to click through these links, potentially leading to further malicious content or phishing attempts.

Machine Learning

Nyx PDF Classifier malicious score 0.9994

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://xpertologist.com/uploads/1/3/1/4/131453784/131453784.html#%25D9%2582%25D9%2588%25D8%25A7%25D8%25B9%25D8%25AF+%25D8%25A7%25D9%2584%25D9%2584%25D8%25BA%25D8%25A9+%25D8%25A7%25D9%2584%25D8%25AA%25D8%25B1%25D9%2583%25D9%258A%25D8%25A9+%25D9%2583%25D8%25A7%25D9%2585%25D9%2584%25D8%25A9
- http://belacaraph.com/uploads/1/3/0/4/130435930/d35f533c3faa.pdf
- http://go77.org/uploads/1/3/0/9/130969375/f67893.pdf
- http://mta-sts.risingsuncounseling.com/uploads/1/3/0/6/130620912/213ce3.pdf
- http://raulrosasound.com/uploads/1/3/0/6/130605368/2383234.pdf
- http://yournextheadquarters.com/uploads/1/3/0/4/130483210/f6c48c95f507e65.pdf
- http://travelismyreligion.com/uploads/1/3/1/4/131454733/1707800.pdf
- http://subtlesurprise.ca/uploads/1/3/1/4/131453096/271e6839d40e3.pdf
- http://travelingchicboutique.net/uploads/1/3/1/6/131606457/kodaxuwidosuv.pdf
- http://1vn.undesirable.us/uploads/1/3/0/6/130621337/8388885.pdf
- http://hostmaster.winefest.ca/uploads/1/3/0/5/130551399/fbd95cf6a93d3a8.pdf
- http://fairytalesandwar.net/uploads/1/3/1/8/131857152/8666933.pdf
- http://hostmaster.mnbdesigns.co.uk/uploads/1/3/0/6/130620878/rubenulesavuwe_taxofod.pdf
- https://tazasituno.files.wordpress.com/2020/06/65914890059.pdf
- https://subezokebiw.files.wordpress.com/2020/06/burit.pdf
- https://miwegakumu.files.wordpress.com/2020/06/46479730308.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00009ffc.bin` `b2e46db645470e70d04d76ddfbdf41269a8f154f6797923e5905c022aabc8f76`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x9FFC	31212 bytes
`font_00_sfnt_off000081ac.bin` `111fe7f8f9d69fa356f8ad20f44e4abacffafe456063b578dba3ae505e4487f3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x81AC	9028 bytes

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