Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe485b3c8ed3de22…

MALICIOUS

PDF

44.3 KB Created: 2020-03-14 16:05:53 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d8d6d5193d93777954c31d52b756341c SHA-1: 3220bc8835e4e60fce730f68e50f7d3e576642f8 SHA-256: fe485b3c8ed3de22a0e7b1d2338215ba41b3ae6c0ce44f1c7d75de59e4f76ea2
94 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many pointing to other PDF files hosted on various domains. This behavior is indicative of a link farm, often used for SEO poisoning or to distribute malicious payloads. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent. No scripts were extracted, and the document body text is heavily corrupted, making it difficult to ascertain a specific lure.

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://enthrone55.pleasingfood.com/uploads/1/3/0/5/130588568/130588568.html#chatham+ontario+weather+report
    • http://mtbyumyum.com/uploads/1/3/0/3/130323235/15be6b9d1a8.pdf
    • http://autodiscover.kidschanceofmi.org/uploads/1/3/0/6/130621178/8645277.pdf
    • http://poconomountainstheatercompany.org/uploads/1/3/0/9/130969644/da1d09a.pdf
    • http://mesheracapital.com/uploads/1/3/0/3/130379142/vixufiw-pakete-temuka.pdf
    • http://a-rose-for-you.com/uploads/1/3/0/5/130541208/wepavajusum_pajezurajeta.pdf
    • http://deluxefrenchfries.net/uploads/1/3/0/4/130490928/bc99fd55e2.pdf
    • http://brothersassociate.net/uploads/1/3/0/5/130588795/tewofazoxoziliz-vabamusete-mulorudoz-verodebi.pdf
    • http://glitzylingo.com/uploads/1/3/0/7/130739105/tadixufafotefutakepo.pdf
    • http://www.graceandcompanysalonandboutique.com/uploads/1/3/0/5/130588617/01880409b0e.pdf
    • http://cadencechiassonlmft.com/uploads/1/3/0/5/130590122/19178657a6ca.pdf
    • http://letusbookwrestling.com/uploads/1/3/0/7/130775269/viluxalalukuwi.pdf
    • http://hostmaster.donendusted.org/uploads/1/3/0/2/130289476/d26e93199cf9b9.pdf
    • http://affordableac.us/uploads/1/3/0/6/130621847/mamimuk-limaf-pazuka-marotu.pdf
    • http://astasira.co.uk/uploads/1/3/1/0/131071286/nitif.pdf
    • http://babylonraleigh.com/uploads/1/3/0/5/130541346/dosidolukutub.pdf
    • http://the-homeservice-pros.com/uploads/1/3/0/5/130551135/b56e4.pdf
    • http://www.beansthebeast.com/uploads/1/3/0/4/130436085/kopewoninezoxek.pdf
    • http://www.shirtsshoesnmore.com/uploads/1/3/0/9/130969728/vaxezeje.pdf
    • http://dealershowing.com/uploads/1/3/0/5/130543653/6515870.pdf
    • http://hostmaster.cazooska.co.uk/uploads/1/3/0/5/130588971/pibilixixomopalakeko.pdf
    • http://mvchoreo.com/uploads/1/3/0/7/130739723/3ae0e1e.pdf
    • http://mybrothersnuts.net/uploads/1/3/0/8/130813846/wazosegit.pdf
    • http://basedstickman.com/uploads/1/3/0/4/130477278/busazadira.pdf
    • http://basedstickman.com/uploads/1/3/0/4/130477278/busazadira
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065c1.bin
740f90a03f16f279acb247a0c156b6ec5a53f36bf1a54b173c3be75b2d9b6fd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65C1 8052 bytes
font_01_sfnt_off0000844b.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x844B 2652 bytes
font_02_sfnt_off00008db2.bin
6ddf53b883350c964210757953e72edacca849803b95280767352c6c691d264d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DB2 16060 bytes

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